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How many lumens are in a watt?

Answer

There is no standard watt-to-lumen conversion value. The amount of lumens per watt depends on the type of light source that is being measured. A general incandescent light source is measured at 10 to 15 lumens per watt.

Watts measure the amount of energy required to light a product, whereas lumens measure the amount of light produced by the product. The more lumens in a light bulb, the brighter the light. A halogen lamp may have 15 to 25 lumens per watt. A compact fluorescent light can produce 50 to 75 lumens per watt, and LED lamps produce 50 to 100 lumens per watt.

Q&A Related to "How many lumens are in a watt?"
Suppose you want to know how much power a lamp consumes. If you know that its incandescent light bulb has a luminous flux of 1,120 lm - given on the light-bulb box - you need to know
http://www.ehow.com/how_4897086_calculate-lumens-p...
It depends on the lamp wattage. For most domestic lamps (40 to 100W) around 12 to 17 lumens/Watt; typical examples below. 25W. = 220 lm, 40W. = 480 lm, 60W. = 850 lm, 100W. = 1700
http://wiki.answers.com/Q/How_many_lumens_per_watt...
There are about 683 lumens to a
http://www.chacha.com/question/how-many-watts-in-a...
he lumen (symbol: lm) is the SI unit of luminous flux, a measure of the perceived power of light. Luminous flux differs from radiant flux, the measure of the total power of light
https://uk.answers.yahoo.com/question/index?qid=20...
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