My current experiment is with 5700k and 3000K EB strips , 200 watts of each , on the same panel (4.5 sq foot tent). I can confirm what ^HydroDan is saying. I can literally stop vertical growth with the 5700K. I screwed up this run (PH problem, nute lockout
and just me screwing with the lights, so the buds are all short because of it), but this was an experiment to prove exactly that; when you give them lots of blue you get more compact growth (which can be good depending on what you are trying to do), seemed slower growth to me as well, but that could be an illusion. I didnt log this run and should have so time frames on the scrog are difficult to estimate, but the idea for the next run will be 3000K on for the entire veg scrog period until its ready to flip to 12/12 (lets call this 'fast n loose' vegging), then use a combination of the two colour temps to control stretch while initially flowering and then back to the 3000K full until the last couple weeks and then back to the 5700K at finish as I hear it can improve terps, flavours etc. So basically I built two lights in one to do this little experiment, but for most people, 3500K from start to finish works. I will have more definite results after a couple more runs.
Another thought was maybe to just go 3000K until the branches have reached the height you want, then stop vertical growth dead with the 5700K and use the blue for the entire flower period?? Hmmmm.
p.s.I experienced light burn on the tops of the buds whenever I go over 35,000 Lumens at canopy. Just a notable piece of info.
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