CMH bulb question

woodpusha

Member
Ive done a few grows and Ive only used MH, and HPS lights. One for veg, and one for flower. With CMH bulbs I guess I'm confused how you make the plant flower, or does it do it on its own? Is there some switch that changes the spectrum of light? I.m really interested in using on bulb my whole grow, just confused on exactly how these work. And Id need maybe a 400-600watt bulb for one plant.
 
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