Need advice on this, Lemon Kush clone.

I bought this clone (lemon kush) today at the local medical despinsary. Was wondering how far i would keep my 400w hps from it? Can i start flowering now, or wait? i just transplanted it. its about 10 inches tall. can i go ahwad and force flower with 12/12? how many weeks can i do this if i start flowering to get highest yield? all info is appreciated

You can start flowering straight away if you realy want, keep it atleast a foot away with a fan hitting the top of your plant, if your foliar feeding and putting it back under the light could cause problems like heat marks and potentially dry out the leaves (my experience) . good luck

Iave an mh 400w bulb without the glass around it. Accidently broke it but it works without the glass. I bought a 400w hps today but it doesnt work on this setup?? the setupis wired to 400w cap with a 400vavc cap wired together?? Plz tell me why my mh light works but not my hps? also how far would i holdlight above it without glass onbulb??