Depending on what kind of MH lamp you have, it can put out anywhere from 31000-40000 lumens. I wouldn't suggest putting both lights in the one box, unless you've got some really good ventilation, or want to bake your plants. Also, there's the increased threat of bleaching your plants with too much light. I learned that putting your plants 5 inches away from a 400 wt MH and draping mylar around the reflector, and taping it to the pots ur plants are in does wonders for bleaching most of the chlorophyl out of your plants. Remember, it's better to have less than adequate light and have your plants grow spindly than too have too much light, and have your plants turn pale yellow/white and stop growing. Your box size is good though. Try to have1-1.5 square feet per plant.
Kronic
__________________ I'm going to a pretty place now, where the flowers grow. I'll be back in an hour or so  |