The red HPS lamp plus the photo-period change to 12/12 are what triggers the change to flower. So yes start hps with 12/12.
Yes a 1000 is big enough for 12 plants as long as they fit in a 6x6 foot square. A 1000 hps has a foot print of 8x8 feet.
it gets weak to the outside edge.

Remember your canapy can only b abut 2 feet deep. The lights don't penetrate any more than that.
KBS is how the big boy's play if ou want to google it. freaken trees.
LOC NAR on probation Reviewed by LOC NAR on probation on . Switching from MH to HPS Should switching from an MH for vegging to an HPS for flowering be done right when you switch to the 12/12 cycle, or after the first sign of flowering? Also is a 1000w sufficient enough for 12 plants? Thanks Rating: 5