I built a hood which uses four 40W-2700K tubes, Four 23W-5000K CFL, and three 27W-6500K CFL. Making a total (as is) of 17900 lumens from 333W. :thumbsup:

By utilizing as many spectrums of light as possible I can grow THICK dense bushes with no problems. Having more will hurt nothing.

However as stated above, your plants do better under a light producing more blue light. 5000K-6500K are best for veg(Blue light stimulates Chlorophyll A to produce stems, leaves). The higher wattage the better! Plus with more bulbs you can hit the plant from multiple angles!:thumbsup:

When you change to flower you want a high red spectrum, such as the 2300-2700K range, Because the plant needs more red light. (Red light stimulates Chlorophyll B to produce flowers).

I've read that BOTH during all stages is actually best. Hence the Hortilux blue, and the "newer" duel arc bulbs. Which are essentially a MH and HPS built into one bulb.

BTW I'm still flowering under HPS, I just veg under CFLs.:thumbsup: