Hey bud, so is it gonna be 2 or 3 bulbs? I'll toss in an old "what I would do" comment. If two bulbs I'd use a red and a blue. If three I'd do two blue and one red (you said yield wasn't an issue) But all blue in either case would be a problem. Now what would be the REAL difference maker is going ahead and getting a UVB floresant bulb, usually sold at pet stores but also easily found on the net. Start with only 30min a day for a few days the. Gradually step it up to be able to keep it on full 12hrs. Gotta start small because you will essentially sun burn your plants, but in the end it's exactly that effect that will increase trich production,,, as a natural defens by the plant to protect itself from the intense UVB spectrum. This fact is well documented.