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# How much watts does a lamp use?

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.

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## Related Questions

Use the formula I = W/E. Current is equal to Watts divided by Volts.

A typical desk lamp woud use a 60-watts incandesent bulb or a 12 watt CFL bulb, which uses 80% less power.

The usual criteria is that the larger the envelope size of the lamp the larger the wattage of the lamp. The terminology of "big bulbs" suggests that the lamp could be in the range of 400 watts.

220 lumens is equal to a tungsten incandescent light bulb of 15 watts. Halogen lamp 20 watts. Fluorescent lamp 60 watts. LED lamp 60 watts. high pressure sodium vapour lamp 117 watts. Mercury vapour lamp 50 watts or 17.32 candle power

Lamps use whatever voltage they are designed to run on. If the question as asking about the energy used, this is measured in watts. Watts are calculated as: W (watts) = V (volts) x I (amps) which is the product of the voltage and the current drawn.

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.

Bulbs for domestic use are available between 3 watts and 100 watts. Bulbs used in large areas such as theatres and street lighting can be up to 2 kilowatts.AnswerA lamp doesn't 'use' power, it uses energy. Power simply tells you the rate at which it consumes energy. So, you can ask how powerful a lamp is, but you can't ask how much power it uses!

it depends what kind of bulb you have in it. how many watts??

The power rating is printed on the lamp holder, expressed in watts. As power describes the rate of energy consumption, you need to convert the number of watts into kilowatts (divide by 1000) and multiply this figure by the time for which the lamp is in use (expressed in hours) -this will tell you the number of kilowatt hours of energy used.

LEDs and CFLs use about a quarter of a halogen so the answer is 35-40 watts.

The voltage and power should be marked on every bulb.

A lamp post produces exactly zero watts, just like my computer produces zero watts. It is a user of electricity, not a producer. The amount of electricity used will depend on the bulb that is used in the lamp post.

None, the watts come form the electricity supply and the lamp uses them at a rate of 100 an hour when it is turned on.

The ratio of lumens to watts is termed the 'efficacy' (note, this is not the same thing as 'efficiency') of a lamp. The efficacy of a lamp depends on the type of lamp: for example, incandescent lamps have low values of efficacy, whereas others, such as fluorescent lamps have much higher values. You need to check the internet to determine the efficacy for the type of lamp you have in mind.

40 watts is 40 watts, that is what you are paying for. However, an incandescent bulb uses the 40 watts to make light and heat. The compact bulbs make more light and less heat for the same wattage. To actually save, choose a lower wattage that will give acceptable light levels.

T-12 is a kind of lamp fitting, and the lamps can have a range of power from a few watts up to 125 watts. So the maximum powered ones would use a unit (kilowatts-hour) in 8 hours.

500-1000 watts, depends on the usage of the freezer.

If the lamp is rated for the maximum bulb wattage, usually 150 watts, and there is a switch and base that accommodate the bulb you should be okay.

If the exit fixture uses a LED lamp it will have a 1 to 3 watt rating. If it is a incandescent bulb, each lamp will draw about 25 watts each.

well it depends on the type of lamp but it should say on the packaging

Since the utility company bills you on watts used per hour, the lower the amounts of watts you use the more money yo will save.

The light bulb that is in the lamp is what determines the wattage load. All lamps are rated for a maximum wattage and this rating should not be exceeded due to a possibly heat build up.

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