I never thought about switching after a few weeks b/c I am doing a rotating grow. That is to say I harvest 1 plant ever 3 weeks or so so I have continual harvest rather than all at once, the start over. I was thinking about mixing say a 1kW HPS and a 250W MH, and that is when I stumbled on this sucker.

Maybe I can find room fora third room... 1 for veg under CFLs, 1 for first few weeks of flower under MH, amd a final home stretch flower with HPS! Bah, too much bookwork keeping track lol.
eggrole1 Reviewed by eggrole1 on . Hilux dual core hybrid HIDs Anyone have experience with one of the "dual core" HPS/MH hybrids? HiLux Gro - Grow Light - Horticulture - USHIO I have been using a 1kW MH (in a switchable ballast) for flowering b/c that is what I had available but now I started looking at getting an HPS bulb. From what I have read it will give me nicer buds, but the plants will be smaller(density wise)/stretchier. Then I found this bulb and it looks like it might be a magic bullet in terms of spectrum. Thoughts? Rating: 5