Do yourself a favor and work with something air-coolable.
For veg, HPS is not the most efficient way to go.
If you are FLOWERING under 1k of HPS, you should be VEGGING under ~400w of MH or the flourescent equivalent. Otherwise you are wasting electricity.
stinkyattic Reviewed by stinkyattic on . What is the recommended height for 1000watt light? For a 1000watt light, would the height from the top of the plant be 18-24inches? Does it differ wether your in the veg. stage or the flowering stage as far as the height of the lamp goes? Rating: 5