There is absolutely nothing in the spectrum of a CFL that can't be had in LED, and they are very inefficient compared to LED. Also, if you are going to make the statement " significant evidence" about anything, then you should provide links to said data, otherwise it's still conjecture.
Yes, I've been reading into a lot of datasheets for all the specific nm's I'm interested in and ive tried to diy my own stuff but its extremely expensive. Theres very, very little evidence to support anything with FR. Its very likely active in photosynthesis but i have yet to see anything that conclusively proves its worth it. Its very simple if you think about it as the shade trigger. THC, flavor and color compounds being like sunscreen, why would a plant produce subscreen in the shade. Take a look at the interactive chart here
Heres flourescent peaks
commons.m.wikimedia.org
Flourescents provide UVA and UVB which have been proven to increase THC. They also have a green peak around 550nm thats perfect for increasing bluing and purpling, other peaks are also good for orange colors like carotenoids. The cheap price of flourescents outweighs the efficiency. I'm going to be installing a 36inch reptile bulb in a 2x4. Plug and play piece of kit for 35$ to get the same in leds would cost me double and be a huge hassle to assemble AND the efficiency gain wouldnt be that much. LM301B isnt the end all be all light, it is however a great base spectrum, cheap and highly efficient. The RSPECs are even greater, i love mine. My only complaint with the QBs is they dont produce as potent or flavorful bud as HPS or MH, those however use more than double the wattage. Far red is the wrong way to go IMO, and until they make some efficient UV leds, QB with a flourescent supplement is the way to go.
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"The plants grown without FR displayed darker leaf color. Another observation was that the plants without far-red had a stronger spicy taste"
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"The data shows that the amount of terpenes in dried
Cannabis flowers increases with a “No Red” light
treatment for the final three days of production.
Based upon these findings, we feel confident in rec-
ommending a spectrum control program that elimi-
nates red light output from LumiGrow fixtures for the
final 72 hours of the Cannabis flowering cycle. "
Not using far red results in more color, more flavor, more terpenes and likely more THC. it may help in inducing flowering but not taking a week off your flowering time. It will also cause stem elongation, resulting in less nodes, less overall bud, possibly why some people claims it flowers faster, because mine are always mature at different times based on where the buds are on the plant. All the evidence that says far red increaes yields is based on lettuce.
