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An electrical watt is a measure of power. A 40 watt light bulb uses 40 watts of electrical power. It has a relative measure of twice the light output of a 20 watt bulb and one half the output of an 80 watt bulb.

A 40 watt bulb uses 40 Joules of energy each second, or 40 watt-hours of energy each hour. In 1000 hours it uses 40 kilowatt-hours or Units of electrical energy.

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โˆ™ 2014-08-21 11:00:48
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Q: What does 40 watts bulb mean?
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Related questions

What does 40W mean on a light bulb?

It means that the power consumption of the bulb is 40 watts.


How many watts are in a security light with a 40 watt bulb?

If it is a 40 Watt bulb it converts energy at the rate of 40 Watts as long as it is switched on.


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40 watts.


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It depends on the bulb. A 25 watt bulb uses 25 watts, a 40 watt uses 40 watts, a 60 watt bulb uses 60 watts, a 75 watt bulb uses 75 watts, a 100 watt bulb uses 100 watts, all the way up to a 500 watt bulb. Incandescent bulbs are about to cease to exist, so this answer is only good through the fall.


Connected in parallel which bulb will glow brighter A 40 watt bulb or a 100 watt bulb?

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Is a 40 watt bulb the same as 580 lumens?

40 watts means that it uses 40 watts of electrical power. Lumens measure the amount of light produced. An incandescent bulb produces around 10 lumens per watt.


What does it mean by writing V and W in a bulb?

V on a light bulb means volts. W means watts.


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A 40-watt bulb requires 40 watts of power. It can come from any kind of electric generator.


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60 watts. This means that the 40 watt bulb uses less electricity but it also produces less light.


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What is the resistance of a 40 watt bulb?

On this calculation I am assuming that the light bulb is using a 120 volt source. Watts = Amps x Volts. Amps = Watts/Volts, 40/120 = .33 amps. R = Volts/Amps, 120/.33 = 363.6 ohms resistance in the 40 watt light bulb.


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How many watts is light bulb 120 VAC 60Hz 300mA?

Multiply the current by the voltage: 120 times 0.3, which is 40 watts.


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What is the energy used in one second when a bulb have 40Watts.?

40 Joules, I think, as the formula for Watts is Joules/Second = Joules per second 40 Watts should equal 40 Joules per one second...


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An 1141 bulb consumes 18.4 watts.


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You should not use a higher wattage bulb in a lamp that says 40 watts. The higher wattage could cause the lamp to catch fire due to the excess heat and could cause you serious electrical problems.


What does it mean when 100 watts is written on an electric bulb?

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Can I use 50 watts light bulb for weed plant