Quote Originally Posted by Torog
Howdy MajorBuds,
I have approxiamately 16 - 18 square feet,that I will be using to grow 4 plants in ,and if I divide 1000 watts by the square footage,that means that I'll have 62.5 watts per square foot,right ? If I add another 400 watts to that,it would jump up to 87.5 wpsf,isn't that too much light ? I'm worried that the 62.5,is too much..?

As long as you can deal with the heat at the top of your plants then more is better. With more light you can use Co2 and the plant will absorbe it even better. Just monitor the heat at the top of your plants with a remote temprature probe so you get a reading with the door closed.

Peace