[SuiJuris]

From my understanding a HPS light is based on a 112.5 lumen per watt base (400 w HPS = 45,000 lumens).

2500 lumens per square foot is optimal.

you have 12 sq. feet to work with (3 x 4 = 12) and so a 400 watt hps light will provide you with 3750 lumens per sq.

this is plenty.

although its just another opinion.

I understand how 600 was come up with under the 50w per sq. guide (600 divided by 12 = 50w per sq.) but its the lumens your looking for. hope this has helped

By the way, I like the door idea, very clever. It would be neat to incorporate a filter with a fan into the vents also... to take care of a few things at once.


take care... good chaos to you :-)