depends on the dimensions of the grow room, I think the 3x 600w is better for covering more area

if you can't read what it says:

Three 600-watt HIDs actually deliver more light to plants than two 1000-watt HIDs. Smaller HIDs provide three points of light and can be located closer to plants.
-George Cervantes growers bible
Revanche21 Reviewed by Revanche21 on . advice needed 2 1000 HPS or 2/3 600 HPS I have a 4x8 table I that I have 36 square buckets with misting sprinklers. I have been using 2 1000 watt HPS lights. I am planning on buying new electronic ballast and am wondering can I get by with 2 600 watt lights? If not instead of buying 1000 watt should I get 3 600 watt lights? Now lets say I am running two of these tables with a total of 4 1000 watt lights. There is 2 1/2 feet space between the two table, so maintenance can be done to both sides of each table. I have been trying Rating: 5