i had no problems when i started seeds from a 400mh. go ahead and do it. i would put the light about 2 feet and every day lower a little it or else your going to get stretching going on. 400 is fine you just got to temper those little baby leaves to that new strong light.
cigarettes42 Reviewed by cigarettes42 on . When should I switch my lights? This is my 3rd grow(2nd Indoor) and I was wondering when I could put the babies under my 400w MH? Since they have sprouted they have been under a Dual 4ft flouro shop light and are doing well.Hope to hear back soon:jointsmile: Rating: 5