Many manufacturers report around 80 to 130 Lumen per watt (lpw), in research/prototyping Samsung is reporting 140 lpw and phillips is reporting 200 lpw. the phillips prototypes are not scheduled for mainstream production before 2015.
On average, LED lamps have an efficacy of around 80-100 lumens per watt. This means they produce 80-100 lumens of light output for every watt of electricity consumed. Advanced LED lamps can have even higher efficacy, up to 150 lumens per watt.
10-11 lumens per watt for incandescent bulbs 13-14 lumens per watt for halogen 50-60 lumens per watt for fluorescent
Typically power leds operate as 1-2 watt units. 50 watt is a little excessive for a single led: it would have to be an array. The light output that can be achieved in normal use appears to range from 80-120 lumen/watt, so I guess the answer would be something like 4000-6000 lumen!
The output of bulbs varies. A typical output of a 60W incandescent bulb is 680 lumens.
Should be about 850 lumens. The same brightness is produced by a 15 watt CFL.
The energy consumption of a modern Cree XP-G or XM-L based flashlight with 170 lumen output can be as low as 1.4 watts with 120 and more lumen per watt. The light output will be approximately equal to a 20 W tungsten incandescent light bulb or a 10 W halogen light.
There's a range of products in each category and incandescent lumen output degrades more quickly than halogens due to typically short lamp life. Try this for a start. "14-17.5 lumens per watt for standard "A19" 120 volt 60 to 100 watt incandescents, and typically 16 to 21 for most halogen lamps." Conceivably, you could get 210 lumen output in a 10w halogen and as much as 1050 lumens out of a 60w incandescent. MR16's list beam power, rather than lumens because they are so focussed and directional.
28,500 Lumens (approximately) there will be variance for other factors including manufacture.
This question is ill posed. Lumen is a unit of measure for how much light comes from the lamp Watt is a unit of measure for how much energy is used by the lamp If the question were; "Which is brighter, a 2000 lumen bulb or a 1500 lumen bulb?" then the answer would be: The 2000 lumen bulb. I think the relation ship between lumen and watt is something like: Incandecent bulbs are 15w/lumen Flourecent bulbs use 40w/lumen LED bulbs are 70w/lumen The way to show the watt and lumen relationship is usually lumens (amount of light) per watt (energy consumption). This is like gas in your car (Miles or KM per Gallon or Liter). Incandescent bulbs have a maximum luminosity of 52 lumens/watt. Fluorescent bulbs range from 46 lumens/watt (CFL) to 100 lumens/watt (T5 and T8 tubes) LED bulbs range from 29 lumens/watt (older, low efficiency) to 100+ (XCree) and they are getting better.
It will power two 400 watt lamps.
It varies from about 600 to 1100 lumens. Typically the higher the lumens output, the shorter the lifespan of the globe. Have a look at this list of globes for purchase whih shows wattage and lumens: http://1000bulbs.com/category/75-watt-incandescent-standard-shape-light-bulbs/
around 21,000 average 100 watt bulb is around 1400 lumens. That's 14 lumens per watt. 14X1,500 = 21,000
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