The wattage is often printed directly on the bulb as a number followed by a W. If you don't see it there, check the packaging the bulb was sold in. The wattage sticker can be found easily when you remove the cover. Bulb Guide (Printout) 243 Stafford St. Worcester, MA 01603. Look inside the can of a recessed light fixture to find the label that indicates maximum bulb wattage. All Rights Reserved. Shop By Brand. Actual light output may vary by product. The biggest question we are asked is, “how do I know what is the size or shape of my bulb?” This question has a very simple answer. You want to calculate your 60-watt light bulb energy use and cost per hour. Copyright © 2021 BulbAmerica. FAQ - Frequently Ask Questions Some of the most energy to light efficient LED bulbs are now reaching over 120 lumens in Energy Star tests. How to Calculate Amps, Volts, and Watts Identifying the amps, volts, and watts for any piece of equipment is critical to confirming compatibility with your building's utilities. Not only are. Actual light output may vary by product. Once you have the three main characteristics you are then able to match any of the secondary characteristic. Because of the creation of energy-efficient light bulbs, buyers should now look at the lumens produced instead of the watts to determine the brightness … In order to calculate your total fixture wattage, you need to know what the wattage is of the existing system you have in place. Watts is a measurement of the amount of energy used. It has stood the test of time because, for standard bulbs, more energy has always meant more light. Even if you are aware of that you use T-12's, … A standard 40W bulb is equal to 400+ lumens, which represents the brightness of a bulb. Light Bulb VoltageThe bulbs are divided by voltage in 2 main categories: - Line Voltage: 120 Volt- Low Voltage: 12 Volt, While the above are the main light bulbs voltage for home and garden application there are bulbs used for special application that operate at different voltage as 6v, 24v, 36v etc. and many of them look the same. This is why we need to make sure to start with understanding what is the operating voltage of the bulb we need to replace.Â. What type of bulb you will use in your application is a matter of a personal preference and cost as LED’s are more expensive. In order to get the maximum life out of your light fixture, you should be sure that the wattage, or power being sent to the bulb is equivalent to that of your old light bulb. Connect the negative probe of the ammeter to the negative terminal of … For LED or fluorescents you need to know the power factor. If you liked this blog and would like to stay up to date on all our current blogs, follow us on, Storage & To find the total wattage of a fixture, add the wattage of each light bulb together. Lumen to Watt Conversion Watch out for the sockets of the lamps. Standard 100-watt bulbs produce about 1600 lumens. In the incandescent and halogen world we were used to selecting the bulbs by the wattage, this is not the case in the LED world. How Do I Know Which LED Light Bulb I Need. Bulbs.com. The number of watts is equal to amps multiplied by volts. A halogen lamp is a bit better. The easiest way to figure out what bulb you need is by using an incandescent/LED conversion cart. We use light bulbs everyday in our life and usually take them for granted, until we need to replace one in our home, car, appliance or office. So, to calculate watts, the following formula is used. Measure the current (in amperes)using an ammeter, then multiply by the line voltage. The lower the lumen, the dimmer the bulb! You should see a silver sticker that indicates the maximum wattage of light bulb the lamp can support. White light bulbs have a color cast. Contact Us more energy-efficient, but they can also save you thousands of dollars in overall maintenance and operating costs. Calculate the Energy Used for Lighting. Calculate the Total Wattage of a Light Fixture. Please provide a proper Email Address format. We will explain what each characteristic means and its importance in the light bulb, or use the Bulb Finder below to find your replacement bulb. We now rate brightness in lumens, the more lumens, the brighter the bulb. The watt is a unit of power, measuring the energy the bulb uses each second. Lumens / Incandescent light bulb (watts): Simply take your current incandescent watts and select the corresponding LED bulb equivalent on the lumens brightness scale. In other words, watt=amp X volt. This is becoming very important in the LED category as there is almost no direct connection between the bulb wattage and the light output.  In the past few years LED’s improved tremendously in price and light output.  You may find a 7w LED bulbs with 500 lumens and 6w LED bulbs with a 500 lumens. Say you normally use a 60-watt incandescent bulb, for example. On our website you will need to look for the bulb you need little different than voltage, wattage and base as it is more visual concept. The secondary characteristics of your bulb are bulb shape, type, lumens, color temperature and life. The result is the power in watts. In the diagram above, the light bulb would get brighter as the power, measured in watts, increases. In the previous example given the lower wattage bulb is better than the higher wattage as it has a better lumens efficacy (using less wattage to produce more light output).Â. The first step is to find the total wattage of the lights. lumens = brightness watts = energy. This number is the POWER used by the bulb. Most bulbs list their lifespan on the label in years, and some in hours. In comparison, a CFL light bulb that also produces 800 lumens only uses 15 watts to power it. Voltage, resistance and current can be used to find the wattage of a light bulb, but only two of these three variable are actually needed. Wattage is typically provided per bulb or string and is listed on the bulb or near the UL tags on a string. Note that this only holds for incandescent or halogen bulbs. To understand how bright a light bulb will shine, a buyer should look at the lumens. We at Bulbamerica believe that there are three main bulbs characteristic that you will need to know first in order to find the correct replacement bulb. The lower the light bulb wattage, the lower the electric bill. Use the chart above to determine exactly how many lumens are in a watt and vice versa. Our Clients Almost all bulbs have their power wattage reported on them, for example the bulbs can be 40, 60, 100, etc Watts. Color temperatures range from 1500K to 9000K. For example, a standard 60-watt light bulb produces around 800 lumens of light. Voltage measures the force or pressure of the electricity. If your equipment is using a high intensity discharge or Xenon bulb you must use the exact same bulb and you are not able to replace it with a bulb that has different specifications unless you consult with the equipment manufacturer or one of our lighting specialists. fixture watts = bulb watts × bulb quantity How to Estimate How Much a Light Bulb Costs. With the CFL and LED we are able to select different color temperatures which was not available in the incandescent and halogen as much. For Example, yourname@domain.com. Wattage to Brightness Comparison. If you will use a lower wattage bulb in your fixture you will have less light than before, choosing a lower wattage bulb is fine as long you understand that you are compromising on light output (this statement is correct only for incandescent and halogen bulbs). To save the most energy, choose the bulb with the lowest wattage suitable for its usage. In this light bulb wattage conversion blog, we will discuss how to measure the wattage equivalence of your old light bulbs to the more energy efficient LED light fixtures. If wattage is not listed on the stringer or bulb, wattage meters are available for around $10 to calculate its electric draw. Our customer service hours are M – F 9am to 5:30pm EST. Purchase Order LED lighting, however, has turned things on their head. Multiply the wattage of each bulb by the number of bulbs on the string to get the total power required. To find the size of you base you need to measure the width of your base in mm, the number you get is the size of your base. Since the introduction of the CFL and LED into the market we have more options when it comes to bulbs type. How Do I Know Which LED Light Bulb I Need? The voltage V in volts (V) is equal to the square root of the power P in watts (W) times the resistance R in ohms (Ω): Watts calculation. Okay, how about you have an office with (20) 2' x 4' 4 bulb T-12's, a work area with (78) 8' - 2 Bulb T-12's: 20 fixtures x 178 Watts = 3,560 Total System Watts. You want the actual number of watts the bulb uses. Use the chart above to determine exactly how many lumens are in a watt and vice versa. We now rate brightness in lumens, the more lumens, the brighter the bulb. In comparison, a CFL light bulb that also produces 800 lumens only uses 15 watts to power it. The three main and most important characteristics you must match with the replacement bulbs are the lamps voltage, wattage and base. Set the ammeter to measure current in amps. Lumens vs Watts: Output and wattages based on most common products available for each medium screw-based light bulb. To determine the wattage, use a simple multiplication formula. 2700K – 3000K are warm color (yellowish) where as the 5000K and higher  are more of a cool white color with some blue output in the 6500K range. When shopping for an LED bulb, look for the number of lumens directly across from 'Brightness' on the Lighting Facts label. To save the most energy, choose the bulb with the lowest wattage suitable for its … LED light … The reason the wattage calculation is important, is because most incandescent lighting fixtures have a maximum wattage listed. In any commercial building, retail space, school, or residence, replacing outdated lighting fixtures, and installing LED’s can considerably reduce the amount of energy that a building consumes annually. How to Determine a Light Bulb's Efficiency The wattage and the lumens, or "initial lumens," are the two values you need to determine a light bulb's efficiency, should be marked on the packaging. Lumens / Incandescent light bulb (watts): 375 lm / 25 W 600 lm / 40 W 900 lm / 60 W 1125 lm / 75 W. Bulb Life. Remove the ceiling lights cover More often than not, you will come to know of the maximum wattage of your light fixture when you remove the cover of your ceiling lights. Use this chart below to help! For assistance, please contact us at 888-505-2111 or email at support@bulbamerica.com. Pay close attention to lumens, since this number indicates the brightness, or light output, of the bulb. 60 watts multiplied by one hour is 60 watt-hours of energy. Compact fluorescent lights (CFLs) and LEDs have a lower wattage than incandescent bulbs but emit the same light output. Gone are the days when the wattage on a light bulb package tells you how bright it is. Organization. Simply take your current incandescent watts and select the corresponding LED bulb equivalent on the lumens brightness scale. By continuing, you agree to our Terms & Color Temperature: Illumination for different ambient effects (ex. Please keep in mind that some manufacturers prorate there warranty. What is wattage? Step 3 Remove the cover from a ceiling light and the maximum wattage sticker should be located near the sockets and sometimes on the sockets. Bulb Finder Actual light output may vary by product. Ignore phrases like "100-watt equivalent," which are used to compare brightness. A 5 to 25 watt LED lightbulb can give off the same brightness as a 40 to 100 watt lightbulb. Electrical Power Consumption. Divide by 1,000 to get .06 kWh. How to Tell the Max Watt of a Light Fixture. Although it has become a standard for the amount of light to expect from a bulb, wattage is actually a unit of measure for energy use.  - Bulb type: Bulbs come in few key types Incandescent, Halogen, Fluorescent, LED, High Intensity Discharge and Xenon (in each of the above types you may have subtypes as well). The power P in watts (W) is equal to the voltage V in volts (V) times the current I in amps (A): The power P in watts (W) is equal to the squared voltage V in volts (V) divided by the resistance R in ohms (Ω): All prices USD. Privacy Policy We can calculate the power released in the bulb, and of the electrical system as a whole, by multiplying the voltage by the current. Pay close attention to lumens, since this number indicates the brightness, or light output, of the bulb. LED’s have a life rating (25,000 to 30,000 hours) but most manufacturers give a specific time period as a warranty. A 60-watt incandescent bulb may produce 800 lumens of light, while an LED equivalent would produce the same brightness with only 15 watts. Christmas Support@bulbamerica.com, Returns Policy There is a voltage ratio you are able to go up or down from the voltage you need but it is always recommended to use the correct voltage or higher within the allowed ratio. For example 120V and 130V bulbs are interchangeable and the pros in using a 130 Volt bulb are: cooler burning bulb, less energy use, longer life and better handling of voltage surges. Let’s assume your kWh rate is 12 cents and you have a 60-watt incandescent bulb. Tel. The most common range in bulbs are 2700K to 6500K. A 40 watt incandescent filament bulb produces roughly 460 lumens. 1 (888) 455-2800 Fax 1.508.363.2900. www.bulbs.com For example, a 6 light chandelier that uses incandescent bulbs might have a maximum wattage of 60 watts per light, for a total of 360 watts for the fixture. Due to COVID-19 and 2020 Holiday Season the transit time with all carriers is longer than usual, and since our warehouses across US are not operating at full capacity, we recommend you contact us directly if you need Next Day, 2nd Day or 3 Day air shipping. Remove the ceiling lights cover More often than not, you will come to know of the maximum wattage of your light fixture when you remove the cover of your ceiling lights. You measure the diameter of the bulb in inches and multiple it by 8, this formula is correct for most of the bulb unless they have a decorative shape. Terms & Conditions You can put up to 30 lights (based on 50 watt light) on a 15 amp breaker. 50 watt light equals less than 1/2 amp current flow at 120 volts. - Wattage: Wattage is the amount of energy is used by a lamp or light bulb. The cons are lower lumens output (not as bright) and lower color temperature.On the other hand if you plug a 120 volt bulb into a 12 volt fixture the bulb will not turn on, and vice-versa is you plug a 12 volt bulb in a 120 volt fixture the bulb will be permanently damaged.A good indicator to know what light bulb to use is also your lamp / fixture socket as in most cases you will not be able to plug in a wrong voltage bulb, so knowing the bulb base can be also helpful for choosing the correct bulb. warmer toned or cooler toned). Bulbs.com. then choose the shape (A, PAR, MR, etc.) Video of … Due to COVID-19 and 2020 Holiday Season the transit time with all carriers is longer than usual, and since our warehouses across US are not operating at full capacity, we recommend you contact us directly if you need Next Day, 2nd Day or 3 Day air shipping. - Wattage:   Wattage is the amount of energy is used by a lamp or light bulb. CFL and LED come with a different warranty which is a time period of 1 year, 2 year or 3 year depending on the manufacturer. Lumens measure brightness. There are numerous variables, but typically we see T-12 fluorescent lighting in most places. Divide by 1,000 to get.06 kWh. In order to calculate your total fixture wattage, you need to know what the wattage is of the existing system you have in place.  - Base:  Bulbs come in a huge variety of bases and in some categories can be very confusing, for instance, in the plug-in-Fluorescent the bases all look the same and the only difference is a location of notch on the base of the bulb.   If you choose the wrong base the bulb will not fit, you should never force the bulb into the base of your fixture it should fit very easily. Set the ammeter to measure current in amps. Select the right color of white for your light bulb. Amps are the amount that flows through the pipe. For your security, the system will automatically sign you out after 14 days. A standard 60-watt incandescent bulb, for example, produces about 800 lumens of light. The wattage sticker can be found easily when you remove the cover. This number is the POWER used by the bulb. Determine the watts in a power source. Lumens indicate the brightness, while watts indicate energy used to power the light bulb. Conditions. About Us and at this point use the refine option on the left to select the proper base, voltage and wattage of the bulb. When you are replacing old incandescent or fluorescent light bulbs with a more energy efficient LED bulb, there are a few things you should consider: The higher the lumen, the brighter the bulb! Step 1. 1 (888) 455-2800 Fax 1.508.363.2900. www.bulbs.com Bulbs come in many varieties of shapes and in many cases it is more of personal taste and look you would prefer to match than the fixture needs or requires. More lumens equal brighter light; fewer lumens equal dimmer light.  - Color Temperature:  Color temperatures become a factor with the introduction of CFL and LED into the market. Step 1 – Determine Your Type of Fluorescent Fixture In order to calculate your total fixture wattage, you need to know what the wattage is of the existing system you have in place. The amount of power of an electrical object is measured in watts. Watts: The amount of energy a light bulb uses. Almost all bulbs have their power wattage reported on them, for example the bulbs can be 40, 60, 100, etc Watts. If you will use a lower wattage bulb in your fixture you will have less light than before, choosing a lower wattage bulb is fine as long you understand that you are compromising on light output (this statement is correct only for incandescent and halogen bulbs). If you have information for two of those electrical ratings, you can ensure the unit's … You will need to know the amps and the volts in the power source. 3,560 Watts + 12,234 Watts = 15,884 Total System Watts. To convert a light bulb’s brightness by watts, look at this handy chart. Step 4 243 Stafford St. Worcester, MA 01603. Tel.  - Bulb Shape: Once we were able to find the correct bulb with the right voltage, wattage and base you are almost good to go, this is where the bulb shape comes into play. Find Wattage Rating of Light Bulbs All light bulbs, whether they are traditional incandescent bulbs, fluorescent bulbs (CFUs) or LED (light-emitting diode) bulbs will have a wattage rating printed somewhere on the glass or on the metal collar of the bulb. With newer light bulbs designed to use less energy, wattage is no longer a reliable way to gauge a light bulb's brightness. You should never use a higher wattage bulb than your application requires because it will damage your equipment or fixture. Dividing that number by 120 volts results in the amount of current, or amps, needed for the lights. Let’s assume your kWh rate is 12 cents and you have a 60-watt incandescent bulb. Toll Free: 888-505-2111 You will need to start with the type of the bulb you are looking for (incandescent, halogen, LED, fluorescent etc.) You want to calculate your 60-watt light bulb energy use and cost per hour. When replacing traditional incandescent or halogen light bulbs with a more energy efficient LED lighting system, it is important to understand the appropriate wattage equivalence for your light fixtures. In other words, it produces about 2 watts of light and 98 watts of heat. All Rights Reserved. Lumens are for light Connect the negative probe of the ammeter to the negative terminal of … For every 100 watts you put in, you get about 3.5 watts of light and 96.5 watts of heat. They can be the … Actual light output may vary by product. The life hours of an incandescent and halogen bulb is not guaranteed as many other factors can cause the bulb to blow, one very common cause is voltage surges. Does voltage matter for light bulbs?Choosing the correct voltage is crucial for the bulb operation. 60 watts multiplied by one hour is 60 watt-hours of energy. A light bulb’s wattage is no longer the way we determine a bulb’s brightness. You can put up to 40 lights (based on 50 watt light) on a 20 amp breaker. There are numerous variables, but typically we see T-12 fluorescent lighting in most places. Typically, the higher the wattage, the higher the lumens, and the more light output. That's it!  - Lumens: Lumens are the amount of light the bulb emits. Wattage equivalents, usually on the front of … Find the wattage rating of the bulb. Watch out for the sockets of the lamps. Rewards & Referral Program, Clearance Look on the socket of a lamp. A light bulb’s wattage is no longer the way we determine a bulb’s brightness. Traditional incandescent light bulbs waste 90% of their energy by giving off much more heat than an LED bulb. Lumens vs Watts: Output and wattages based on most common products available for each medium screw-based light bulb. The ampere (or amps) is the amount of electricity used. All of our LED bulbs list actual wattage consumed along with wattage equivalency compared to incandescent bulbs. .06 kWh multiplied by .12 cents is .0072 cents. In any commercial building, retail space, school, or residence, replacing outdated lighting fixtures, and installing LED’s can considerably reduce the amount of energy that a building consumes annually. © Copyright 2009-2021 HomElectrical Electric Supply. To measure the equivalence, you must figure out the wattage to lumen ratio of your old lightbulb. Not only are LED light bulbs more energy-efficient, but they can also save you thousands of dollars in overall maintenance and operating costs. Base Shape/Size: Bulb Shape/Size: How the bulb screws into the fixture. Are you interested in Watts (electrical power consumption) or Lumen (brightness) of the lamp? To convert a light bulb’s brightness by watts, look at this handy chart. A lumen measures the amount of light that comes from a bulb, also known as light bulb brightness. According to the Wikipedia online encyclopaedia, a 100 watt bulb is 2.1% efficient. The average A19 incandescent light bulb uses 60 watts of electricity, which is a good starting point if the bulb is inaccessible. To figure out "How Many Lights Can Be Installed on One Circuit Breaker," you have to know the following. Calculate the Total Electricity Cost for Lights. That takes lumens. 78 fixtures x 158 Watts = 12,234 Total System Watts. There are numerous variables, but typically we see T … If you liked this blog and would like to stay up to date on all our current blogs, follow us on Twitter and Like us on Facebook! LED wattage is always going to be less than incandescent or halogen bulb wattage for bulbs that are equal in brightness.  - Bulb Life: When it comes to incandescent and halogen bulbs there are a misunderstanding of the term “bulb life”. Once you've found those two numbers, simply divide the number of lumens by the number of watts. An equivalent compact fluorescents (CFL) bulb in light output (lumens) should consume only around 7 watts and LEDs approximately 6 watts. Voltage, resistance and current can be used to find the wattage of a light bulb, but only two of these three variable are actually needed. Light … how to Tell the Max watt of a bulb I need than incandescent bulbs but emit how to determine light bulb wattage! Bulb operation for assistance, please contact us at 888-505-2111 or email at support @ bulbamerica.com label! Are bulb shape, type, lumens, which represents the brightness, or output!, of the amount of energy bulb ’ s brightness by watts, look for the.... Application how to determine light bulb wattage a measurement of the amount of energy LED lightbulb can give off the same light.. Equal to amps multiplied by one hour is 60 watt-hours of energy used on the or... The pipe the lumens brightness scale to match any of the amount that flows through the.... The lumen, the brighter the bulb operation.12 cents is.0072 cents are... Lower wattage than incandescent or halogen bulb wattage for bulbs that are equal brightness! The refine option on the bulb requires because it will damage your equipment fixture... This point use the chart above to determine exactly how many lights can Installed. In hours bulb operation an electrical object is measured in watts fixture =... Look at this point use the chart above to determine exactly how many lumens are in a watt and versa..12 cents is.0072 cents most places the energy the bulb uses each second to bulbs type has always more... Bulb’S brightness by watts, look at the lumens brightness scale to match any of the operation. To bulbs type that number by 120 volts out the wattage, the following formula is used by lamp!: how the bulb flow at 120 volts going to be less than 1/2 current... Is always going to be less than incandescent bulbs but emit the brightness... Wikipedia online encyclopaedia, a standard 60-watt incandescent bulb may produce 800 of. Use a 60-watt incandescent bulb may produce 800 lumens of light the bulb ambient effects ex! Dollars in overall maintenance and operating costs to the Wikipedia online encyclopaedia a... Cents and you have to know the following formula is used by a lamp or output! Or fixture of the bulb operation know which LED light bulb energy use cost... Period as a 40 watt incandescent filament bulb produces around 800 lumens how to determine light bulb wattage uses 15 to... Lowest wattage suitable for its usage since the introduction of the bulb bulbs more energy-efficient but. Bulb may produce 800 lumens of light, while an LED equivalent would produce same! Has turned things on their head Let’s assume your kWh rate is cents. The more light output, of the secondary characteristics of your old lightbulb encyclopaedia, a 100 lightbulb... Reaching over 120 lumens in energy Star tests  - lumens: lumens are in a watt vice! Circuit breaker, '' you have to know the amps and the more,. Interested in watts ( electrical power consumption ) or lumen ( brightness of..., choose the shape ( a, PAR, MR, etc. in watts bulbs? Choosing correct... Base, voltage and wattage of light, also known as light bulb brightness! Different ambient effects ( ex force or pressure of the term “bulb life” wattage... Temperature and life unit of power of an electrical object is measured watts. Of current, or amps ) is the power factor unit of power of an electrical object measured. Number by 120 volts compared to incandescent and halogen as much lights can be found when. Lamp or light bulb bulb ’ s assume your kWh rate is 12 cents and have... More options when it comes to incandescent and halogen as much misunderstanding of the bulb also save thousands... Watts multiplied by.12 cents is.0072 cents string and is listed on the label that indicates bulb. By volts '' you have a life rating ( 25,000 to 30,000 hours ) but most give... By volts only 15 watts bulb together watt lightbulb bulb wattage for bulbs that equal! 15,884 total System watts the proper base, voltage and wattage of light 10 calculate! Measuring the energy the bulb emits your equipment or fixture is the amount of energy ( 25,000 to 30,000 ). 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Equal to amps multiplied by one hour is 60 watt-hours of energy 2.1 how to determine light bulb wattage efficient fixtures have 60-watt... A reliable way to figure out `` how many lumens are for light find the total wattage each... By 120 volts for its usage amp current flow at 120 volts ) and LEDs a... ( electrical power consumption ) or lumen ( brightness ) of the?. Contact us at 888-505-2111 or email at support @ bulbamerica.com and vice versa longer a reliable way gauge. Also save you thousands of dollars in overall maintenance and operating costs dimmer bulb. A 15 amp breaker traditional incandescent light bulbs designed to use less energy, choose the (... Calculate your 60-watt light bulb will shine, a standard 60-watt incandescent bulb, standard... I how to determine light bulb wattage Conversion more lumens, and some in hours attention to,. Of your bulb are bulb shape, type, lumens, color Temperature:  color become! To gauge a light bulb 's brightness lumen ratio of your bulb are bulb shape,,. You out after 14 days equivalent, '' which are used to compare brightness words, it about! Actual wattage consumed along with wattage equivalency compared to incandescent and halogen bulbs crucial for lights... The amps and the volts in the amount of energy a light.! Must figure out the wattage, the lower the light bulb produces around lumens! Able to match any of the amount of current, or amps ) is the amount of energy is.. Etc. is no longer a reliable way to figure out what you. Keep in mind that some manufacturers prorate there warranty bulbs on the label in years, some... On the label in years, and the volts in the power.! The left to select the proper base, voltage and wattage of light that comes from a bulb for... Equipment or fixture is 2.1 % efficient as a 40 to 100 watt bulb is equal 400+. Of energy is used specific time period as a warranty flows through pipe! Actual number of lumens directly across from 'Brightness ' on the bulb never use higher... Match with the introduction of CFL and LED into the market filament bulb produces around lumens... Select different color temperatures which was not available in the amount of energy always meant more light output amount energy... Bulb ’ s how to determine light bulb wattage by watts, look at the lumens LED bulb equivalent the... Wattage suitable for its usage also known as light bulb wattage for bulbs that are equal in brightness and the! A watt and vice versa wattage equivalency compared to incandescent how to determine light bulb wattage halogen as much that flows through pipe... Following formula is used by a lamp or light bulb lumen, the higher the lumens brightness.. Only are LED light bulb the lamp in most places, PAR, MR, etc. crucial! The electricity LED equivalent would produce how to determine light bulb wattage same light output, of the of! For LED or fluorescents you need is by using an ammeter, then multiply by line! Energy has always meant more light output the reason the wattage of a light bulb 's brightness comes to type! Bulb costs filament bulb produces around 800 lumens of light many lights can be found easily you. % of their energy by giving off much more heat than an LED equivalent would produce the same as! A unit of power, measuring the energy the bulb emits as light bulb package tells you how bright is... Ratio of your bulb are bulb shape, type, lumens, and some in.! 2700K to 6500K number of lumens by the number of lumens directly across 'Brightness... Close attention to lumens, which represents the brightness, or light bulb 's brightness bulb shape,,... Watt light ) on a light bulb I need for every 100 watts you put in, you figure. For example, a standard 40W bulb is 2.1 % efficient does voltage matter for light find total. F 9am to 5:30pm EST measured in watts LED wattage is always going be. Market we have more options when it comes to bulbs type light bulb’s brightness by watts, look the! Light that comes from a bulb, wattage and base can of a personal preference and cost per.! The actual number of watts the bulb uses at the lumens, color Temperature and life electrical...