175 watt security light for flowering?

Yeah, should be enough. Just make sure it's well ventilated and has very reflective surfaces. I've grown 2 (turned out ok...) under a 100w CFL and a 70w HPS. Might just take a little longer to grow.

Now I have 3 under a 400w HPS and 400w Metal Halide and it's a world of difference.
 
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