i'd say ur ganna need at least 400w and throw sum uvb in there to... like a snake light i hear it produces higher thc levels, look it up "UVB,THC and ME" its on YOUTUBE.com.... that dude knows his shit to
The 150 can do 2 plants OK. No tress, gotta treat it like a cfl and flower early. finish size should be no bigger then 2 - 2.5 feet tall. Adding in a few CFLs to fill in the lower section should help.