I have seen 400 / 600 watt bulbs in full action, they are very dim imo.

If you want big plants stay with big watts per bulb, SOG of scrOG 600 / 400 would be ideal.
OregonsDank Reviewed by OregonsDank on . HPS Lamp Question.. Hi everyone.. Starting to set up a grow room, was thinking of 2 1000w HPS lamps to start with, any ideas on how many plants that would cover, or am i better with one Metal Halide & 1 HPS ? Thanks in advance for all the help :p :thumbsup: :) Rating: 5