Hi again Flyback,
I've seen Lumens per watt output go up over the years for white power LED's. So i dont know where you are getting this info from. Maybe i am not understanding you or something.
But even more striking, back in the 1980's i could not even start to build an LED flashlight because all that was available were basically indicator light LED's, which got brighter later in the 80's but still not a very nice flashlight component. Made nice indicators, but that's about it.
And go back to circa 1975 and all i saw were pretty dim indicator light LED's like red, with many applications still using those silly neon glow lamps As an example, i worked for a company that made numerical displays out of hundreds of neon bulbs yet LED's were available. Why would they need to do that if the LED's were already bright enough to use? And they still took 20ma, not 2ma or 0.2ma, so the efficiency must have gotten better somewhere along the line.
Maybe the advances are not as big today, but i suspect they are still working on it.
I've seen Lumens per watt output go up over the years for white power LED's. So i dont know where you are getting this info from. Maybe i am not understanding you or something.
But even more striking, back in the 1980's i could not even start to build an LED flashlight because all that was available were basically indicator light LED's, which got brighter later in the 80's but still not a very nice flashlight component. Made nice indicators, but that's about it.
And go back to circa 1975 and all i saw were pretty dim indicator light LED's like red, with many applications still using those silly neon glow lamps As an example, i worked for a company that made numerical displays out of hundreds of neon bulbs yet LED's were available. Why would they need to do that if the LED's were already bright enough to use? And they still took 20ma, not 2ma or 0.2ma, so the efficiency must have gotten better somewhere along the line.
Maybe the advances are not as big today, but i suspect they are still working on it.