Quote Originally Posted by Earthy Dank
Its not a 3x3 area... that just how much light coveragre my 600w'er has. I really have like 10x20 feet of grow space... so space isn't an issue. So how long of a light rail could i use without lowering the light intensity? I think im going to get some "smart" ballasts when i save up some cash.
Ooooops, sorry. I thought it was only a 3x3. So I use to grow in a room that was 4 x 7. I ran a 1000 watt bulb on a mover in that room and ave. around 34oz's dried, but I had my grows pretty much dialed in. So for the most part you have a tad bigger room. Now, why not try 2 rails each with a 1000 watt bulb. We all know that dual spectrum is the best, so start one light on one side and the other on the opposite side, crossing in the middle. One will be a mh and the other an hps. Get switchable ballasts so if you want all mh during veg. and all hps in flower you can. If you feel this is not enough then 3 rails, 600 watts each, switchable.
Peace.
P.S. I have grown with and without rails. Adding a rail increased my yield around 8 oz's growing LST. Read that again (8 oz's). Rails allow you to get the light very close to the plants without using glass.