is 2500 lumens per watt possible

raggie33

*the raggedier*
Joined
Aug 11, 2003
Messages
13,451
is 2500 lumens per watt possible is 10 years will we see tis
 

Lynx_Arc

Flashaholic
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Oct 1, 2004
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11,212
Location
Tulsa,OK
Nope.... don't think we will see them ever that efficient. I think they are seeing a "brick wall" as to how efficient they can make them and 300-350 lumens/watt may be possible but 8-10 times current efficiency I don't think will happen just like we aren't seeing 10,000mhz computer chips these days we see them add more and more "cores" to get more power.
 

camelight

Newly Enlightened
Joined
Apr 9, 2016
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189
Location
israel
It's not possible. The maxim,um is 683 lm\watt. And that's only in green light (i don't remember why ist the most efficient) so light with 683 lm has energy of 1 watt
 

iamlucky13

Flashlight Enthusiast
Joined
Oct 11, 2016
Messages
1,139
It's not possible. The maxim,um is 683 lm\watt. And that's only in green light (i don't remember why ist the most efficient) so light with 683 lm has energy of 1 watt

In terms of basic physics, a Watt worth of green light represents the same amount of energy as a Watt worth of red or blue light. In terms of actual vision, however, the eye is most sensitive to the green light. This is simply how the eye works, and it may have evolved that way as a result of the fact that sunlight is most intense in that range.

As a result, measurements of illumination are not conducted in basic physics units, but in units that are adjusted to the human eye sensitivity, like the lumen. Achieving a lumen of red or blue light takes more emitted power than a lumen of green light.

The theoretical maximum for high CRI lights is about 300 lumens/Watt. For low CRI, I suppose it might be as high as 400 lumens/Watt.

well now im sad not much to look forward to in lights

There's still some meaningful improvements to look forward to. The best LED's, under ideal conditions, get around 200 lumens/Watt, and those aren't high CRI versions.

Good household LED bulbs have only recently beaten 100 lumens/Watt.

If we can get to the point of having high power lights including their drivers achieve the efficacy levels in real use that low power LED emitters achieve in lab conditions not counting their driver efficiency, at reasonable CRI's, we can double runtimes at a given level, or perhaps even triple the outputs that can be achieved for a given amount of heat to dissipate.

That won't be easy and probably won't happen soon, but I'm hopeful it will eventually be possible.
 
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