I have a Hydrohut delux and have put in 4 600 watt lights. They are hortilux HPS lamps.

I have heard/read that you want at least 50 watts per sq ft and/or 2000 lumens per sq ft.

The HH is 32 sq ft. By that estimation I am at 11,000 lumens per sq ft. and 75 watts per sq ft.

I have grown pretty good plants but density is still not good or at least not as good as I would like.

I heard that a product called phosphoload by DM might help with this but I am not sure.

I have been thinking of going to 3 1000 watt lights. No co2 yet but I do plan to add it.

I am aiming for medical grade so any input will help thanks
sublbc Reviewed by sublbc on . is 4 600 watt lights enuff? I have a Hydrohut delux and have put in 4 600 watt lights. They are hortilux HPS lamps. I have heard/read that you want at least 50 watts per sq ft and/or 2000 lumens per sq ft. The HH is 32 sq ft. By that estimation I am at 11,000 lumens per sq ft. and 75 watts per sq ft. I have grown pretty good plants but density is still not good or at least not as good as I would like. I heard that a product called phosphoload by DM might help with this but I am not sure. Rating: 5