Its own preference or space available

U can put them right into 12 on 12 off but u will be dissapointed later on with the yield.

Good chance they will double in height when u switch to0 12 on 12 off.

If u got the room, grow them big.
stoned88911 Reviewed by stoned88911 on . silver haze? ...got couple of clones of silver haze 400HPS. How long in vegetation till i change from 20h to 12h. period? :smokin: ThanX. Rating: 5