400 W distance question

[FredfromDesire]

Spent quite a lot of time looking through the posts and must be a pest and ask a question that has probably been answered before. I am only 8 days in and I have 1 400W sodium light. How far do I keep the light from the top of the plants?

Thanks so much in advance!

Peace from Praha!

[keeko]

as close as possible without burning the tops. to test that place your hand where the tops of the plant would be for about 5-10secs. and if it burns your hand its too hot for the plant

[FredfromDesire]

Thanks for that! Will do it right now, however what would you estimate..about 6 inches, or closer to 12?

[GaGrown]

12 to 14 inches but it really depends on whether the hood is vented or not. If it's vented,then you can go 6 or so.Still need to place your hand under the light.The back of your hand will tell the tale.

Ga Grown!