Qeustion

Say I had a 6 foot tall area, with prolly 10 feet wide, but I only wanted one or two plants, and had a 400 watt MH light and an 400 watt HPS light, how high from the plants should it sit? and is that too much?

K, here's the thing.... with that much space i would go with more than 2 plants with a 400w... but to answer ur question it should be around 12-18in. from the top of the plant....always start farther away and move closer....put ur hand right over the top cola and if that's too hot for ur hand then it's too hot for the plant....