IDK, I remember seeing the LED experiments on a thread on here... Then I saw a thread on how disappointed people where with it.
IMO LED is by far the #1 source of light in terms of efficiency and longevity. It uses the least amount of wattage per watt and far less per lumen for that matter. When an LED light board is switched on, there is no surge in power as there is in HPS, MH or CMH or even CFL, fluorescent and incandescent lights for that matter.
However I believe that the technology we have and/or facilitate for the light emitting diode, does not at this time, exceed the minimum requirements that a marijuana plant must have to create the process of photosynthesis at the rate in which marijuana requires to thrive.
Sow some seed,
Grow a tree,
Fill your lungs with THC!
White as haze,
Shiny as stars
Buds glisten before cultivators.
The smell is narcotic,
Creeping on my brain,
The rush never stops of this THC train.
And for the 5-0
What you must know
WE SHALL OVERGROW!!!!