if you have a 600hps your gonna want it pretty far away from seedlings. they can't use even close to that much light. as others have said cfls or flouros are a better choice for seedlings. switch to the 600hps when they get bigger and can actually use that much light.
justaseed Reviewed by justaseed on . lighting problem ive heard from lots of people that u need your lights close to your plants to sop them stretching, but this worrys me cos my 600w hps gives off alot of heat and i dont want to burn my plants wen they sprout........how close should i have them im a little confused.............. Rating: 5