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Soggysack, any updates on the yields/quality of cherry ak47 now that you've harvested?

Yea. most household breakers are rated at 15 amps. A 400W ballast pulls somewhere around 3 1/3 amps and the fans probably don't use 1 amp. you'll be fine. your ballast should say the amps on it but if it doesn't: W/V=A so 400W/120V=(3+1/3)A happy growing