Quote:
Originally Posted by OldFart  i agree on that,
but the thing is -
high power LEDs produce 75-80 lum/W
and that all is usable light
while with hps and other more powerfull lights
you use only a fraction of what the plant really need.
here's the research report from the source
you can trust - US department of energy =o) Solid-State Lighting: Research Highlights |
these high power LEDs get mighty hot, so the need a active cooling system to run - and what gets so hot causes new trouble. and high end LEDs rate with 25000 to 50000h, the cost couple times more then a HPS, get less out in lumen and create you a complete new heat problem - besides that they hardly run as long as 2 HPS bulbs will do for a fraction. and that they produce so much more usable light, well that is already so... that the mythbusters should take care of that
sorry
in my view those things aren't ready to do the task today, they will do it in a few years for sure but today it would be money well wasted.