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How Many Lumens Per Watt?

Answer

Luminous efficacy is the measure of the visible light from a light source. The maximum level of efficacy from lumens is 683 lm/W. A light bulb light source is measured at 10 to 15 lumens per watt. A compact fluorescent light can produce 50 to 75 lumens per watt. LED lamps provide 50 to 100 lumens per watt. The amount of watts per lumen depends upon the type of light source that is being measured.
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5 Additional Answers
Different lamps have different lumens per watt. The most efficient lamps have the highest lumen to watt ratio. Fluorescent lamps have extremely high lumen to watt ratios.
The amount of lumens per watt all depends on how much voltage is currently being carried through the electrical currency. Some watts have a lot more lumens than others do.
The number of lumens per watt depends on the type and size of the light bulb. An incandescent bulb gets 13 to 18 lumens per watt, while a compact fluorescent light bulb puts out 50-75 lumens per watt. LED lights efficiencies vary a lot and are seeing rapid improvements. Some have reported efficiencies as high as 135 lumens per watt, although values of 40-60 are more typical.
The amount of lumens per watt all depends on how much voltage is currently being carried through the electrical currency. Some watts have a lot more lumens than others do.
The number of lumens per watt depends on the type and size of the light bulb. An incandescent bulb gets 13 to 18 lumens per watt, while a compact fluorescent light bulb puts out 50-75 lumens per watt. LED lights efficiencies vary a lot and are seeing rapid improvements. Some have reported efficiencies as high as 135 lumens per watt, although values of 40-60 are more typical.
Q&A Related to "How Many Lumens Per Watt?"
1. Lumens are the amount of light produced by a bulb. Find the number for lumen output on the light bulb's box. 2. Wattage is the amount of electricity needed to light the bulb. The
http://www.ehow.com/how_4897086_calculate-lumens-p...
( ′lü·mən pər ′wät ) (optics) The unit of luminosity factor and of luminous efficacy. Abbreviated lm/w.
http://www.answers.com/topic/lumen-per-watt
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
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isn't it obvious? "per" means divide. lumens per watt is the same as lumens divided by watts, and that is 1500 lumens / 56.161 watts = 26.7 lumens per watt.
http://answers.yahoo.com/question/index?qid=201110...
Explore this Topic
1. Lumens are the amount of light produced by a bulb. Find the number for lumen output on the light bulb's box. 2. Wattage is the amount of electricity needed ...
Incandescent bulbs: 10 lumens per watt. Halogens: 13 lumens per watt. CFLs: 50 lumens per watt. A useful bulb to light a small room is 600 lumens, so that would ...
If the 100 watt light bulb is an incandescent bulb it gives off approximately 15 lumens per watt. If the bulb is a florescent light bulb, it gives off approximately ...
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