Science
Units of Measure

# How many joules are there in a led bulb?

252627 ###### 2012-01-16 20:47:40

1) The power use of bulbs is specified in units of power, not energy. In other words, watts - which means joules per second.

2) Light-bulbs come in different capacities.

3) It is incorrect to say that the energy (or power) "is in" the light-bulb. The light-bulb simply transforms one type of energy to another, using electrical energy which is NOT stored in the light-bulb.

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## Related Questions there are 100 joules in an energy efficient light bulb 75 joules go towards the light and 25 joules go towards the heat  Every second a 150 Watt bulb converts 150 Joules from electricity into heat and light. The number of Watts tells you how many Joules pass per second. 100 watts means 100 Joules/Second. So in 24 hours, the bulb would use 24*60*60*100 Joules. so that's 8,640,000 joules 1 watt= 1 joules/1 sec60 w = 60joules/minuteor=3600joules/hour Almost 90 % of electrical energy provided to an incandescent light bulb goes as heat and rest as light. A 100 Watt bulb puts out 100 Joules of heat per second. So - for one minute it would put out 6000 Joules (100 Watts X 60 seconds). 1 BTU (British Thermal Unit) of heat = 1055.056 Joules. So a 100 watt bulb, burning for one minute would put out 5.68 BTUs of heat. ( 6000 Joules / 1055.056 Joules) = 5.68 BTUs. Same bulb burning for one hour would generate 341 BTUs of heat. Joules (energy) are not equivalent to Watts (power).If something converts 6 Joules every second, it is 6 Watts. If it takes ten seconds to convert 6 Joules, its power is 0.6 Watts.Multiply the Watts by the seconds to find the Joules.CommentYou do not 'consume' power. Power is simply a rate; you cannot consume a rate! You consume energy; the rate at which you consume it is power. 40 Joules, I think, as the formula for Watts is Joules/Second = Joules per second 40 Watts should equal 40 Joules per one second...  led bulb lasts for more than 24 hours if they glow continuously but if we use the periodically(from some time to time ) they lasts long for many years  Watt means joules/second. It refers to the amount of energy a device uses, in this case. Multiply the power (in watts) by the time (in seconds) to get the energy (in joules).  welll it really depends on the volasity of light energy but from my calculatios it is 900 LED bulbs come in different sizes and powers. Roughly they consume about 10% of the power to create the same amount of light as a normal bulb. A petajoule is 1015 joules (Quadrillion joules) 100 watts running for 60 seconds uses 100 x 60 Joules of energy. A Joule is the same as a watt-second. It's 100 watts times 3600 seconds, that's 360,000 joules of energy. A joule is 1 watt for 1 second. An LED has a longer life than an incandescent light bulb. Given the wavelength of the photons from above, 3000 nm you just calculate how many joules each photon has and divide that into 100 joules per second. Yes, absolutely. As long as the LED bulb and incandescent bulb have the same base they will both fit the socket. The LED bulb will also run much cooler than the original incandescent bulb. LED bulbs com in different powers, so there's no way to tell. At a guess a 10W LED might compare to a 60W incandescent. With current (as of 2013) technology, from best to worst efficiency, the light bulbs are basically:LED light bulbs (most efficient)Fluorescent lightsThe old-fashioned incandescent lights (worst) 1 Watt means 1 Joule per second, so 60 watts means 60 Joules per second. A light bulb that burns energy at that rate for 3 seconds uses 180 Joules. ###### Home ElectricityInventionsScienceLight Bulbs and Artificial LightingChemistryPhysicsEnergyEnergy ConservationEarth Sciences Copyright © 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.