There are many threads around the net on MH vs HPS vs LED and various flavors thereof, but such tests may have wildly different efficiency and thus they are controlling for watts rather than spectrum.
I'm looking for a test that is specifically controlled for spectrum. For example, three grows from clone to bag with identical PPFD at the canopy across four spectrums:
2:1 Blue:Red
1:1 Blue:Red
1:2 Blue:Red
1:3 Blue:Red
This is possible with today's LED technology.
The point is to find the best spectral ratio for flowering so that the most efficient emitters of that profile can be identified.
Is anyone aware of any well controlled experiments on spectrum?
I'm looking for a test that is specifically controlled for spectrum. For example, three grows from clone to bag with identical PPFD at the canopy across four spectrums:
2:1 Blue:Red
1:1 Blue:Red
1:2 Blue:Red
1:3 Blue:Red
This is possible with today's LED technology.
The point is to find the best spectral ratio for flowering so that the most efficient emitters of that profile can be identified.
Is anyone aware of any well controlled experiments on spectrum?