How many amps in a 40 watt light bulb?

Answer 1

A lumen is the perceived intensity of the light, as seen by the human eye. The lumen value is largely determined by the the nature of the light, i.e. the sum of the different wavelengths of the light being transmitted by the particular bulb type.

The standard tungsten wire-filament ('incandescent') bulb radiates a different type of light to a flourescentlight.

* a 230 V, 40 watt incandescent bulb produces a light (quality) of about 400-500 lumens,

* a standard 230 V flourescent lamp of only 7 watts will produce exactly the same value of lumens, i.e. 400-500 lumens. * the cool white XLamp XP-G 3.5 V LED lamp of only 3 watts will produce a similar value of lumens, i.e. 350 lumens. And is safer for the workers that make them and better for the environment. It is currently more expensive, but prices have been dropping about 20% per year. Therefore LED light bulbs convert electricity into light more efficiently than incandescent or florescent light bulbs. * For more information, See Related links below this box

Answer 2

If we assume a standard household voltage of 120V, the amperage of a 40-watt light bulb can be calculated using the formula P (power) = V (voltage) x I (current). Therefore, for a 40-watt light bulb at 120V, the amperage would be approximately 0.33 amps.

Answer 3

I think the term you mean is "candle power" (candelas is a conversion of the power of a bulb in comparison to the power of a candle) The standard 40 watt bulb power would depend on the configuration of the bulb. (the filiment array, shape of the bulb, amount of refectors or "prizims" incorporated into the face of the bulb as in a flood light) The standard 40 watt bulb in your desk lamp average 25 to 29 candle power. A flood light would generate roughly 35-40 candle power, again, depending on the size of its face.

Answer 4

A 100 W incandescent bulb produces about 1750 lumens or 137 foot-candles

A 23 watt fluorescent light produces about 1600 lumens or 125 foot-candles

Answer 5

A lumen is the total amount of light visible light emitted by a source. A 100 Watt CFL will emit 1750 lumen.

Answer 6

The formula you are looking for is I = W/E. To answer the question the voltage applied to the light bulb must be known.

Answer 7

How many foot candles in a 150 watt bulb?