Just use all of your lights for all of flowering.
Mustelid Reviewed by Mustelid on . MH and HPS mix I have a 400w ballast being gifted to me :jointsmile: I have an existing 250w digital hps ballast (which through an unsucessful test I now know does not burn mh bulbs). I am setting up an 8-12 plant SoG in a 2'8"x2'8"x6' tent. I will obviosly have to use conversion bulbs for the digital ballast, and I don't know what kind of ballast the 400w is. That being said... I was wondering what would be the best mix? 400w mh for first 2 weeks, then add in the 250w hps, then vice versa for late Rating: 5