Is it necessary to use an HPS for flowering, or can I flower under a 42w CFL?I'm trying to convert this old freezer of mine into a grow box. Not that hard, really, but I had one question in mind.
400w HPS in an outlet socket adapter, does that scream "Accident waiting to happen"?
Is it necessary to use an HPS for flowering, or can I flower under a 42w CFL?
I don't have room, or money to buy an HPS or a ballast.