Im using a 600w hps and it is the SHIT. Its not just about the light output, its also about the penetration, if the lights are not penetrating past the canopy you wont have nearly as much growth as you should under the canopy. 12/12 on the hps.
TurboALLWD Reviewed by TurboALLWD on . is this sufficient light? i found a good deal at home depot for 10 x 26w CFL's. 1600 lumens a peice, 6500k, just 30 bucks! im using all of those, flat white paint, and 2 x 27 watt CFL's at 1300 lumens a peice, 5500k, with tin flood dishes around these two so at the math, its 18,600 lumens, bassically mostly a 6500k, and at 314watts.. is that good enough for one plant on a veg stage? Rating: 5