Light

i have a florecent light for veg and a hps 600 for flower how far is the light suppose to be from the top of the plants.

high enough so that it doesn't burn your plants and low enough to keep them from stretching

Well are you talking about the HPS or flo??? They both have distinct different optimum space from the light

the hps light

i fort hps was for veg and mh for flowering?

no it is the outher way around i was also wondering i got the floresent from wal mart and it is 40 watts is that good and how far from the tops of the plants should it be please help thanks

is it a tube or a cfl? and how many plants is it for? and how much space do you have?

it is a tube and i have five plants and the light is 4 feet long my grow space i like 7 feet by 7 feet and like 10 feet tall

bump up a spot

I have fluorescent T-12's and keep them anywhere from 2-4 inches from my 2 plants. Remember the further the light is away will cause the plant to stretch. The tubes do not get hot at all. The cfl's tend to get a but more hot but that's nothing a little household fan won't take care of. Hope this helped.

Hank.

thanks hank

When you first put the plants under an 600w HPS, I would keep them at least 18" away (probably more). Every day i would lower the light an inch or three and keep a close eye on the plants for signs of heat damage (like very 10 min. or so for the first hour). Eventually you can get them pretty close. You can get them real close if you use an air-cooled reflector with glass enclosure.

A good rule of thumb is if your hand can stay under the light (where the tops of the plants are) and it is not uncomfortably hot, your plants should be OK. But do keep a close eye on them at first.

ok so i should have them 2 inches away for the floresent light and when i am flowering with the hps i should have them 20 inches away them move closer

I don't have experience with the fluorescent so can't say. But a 600w HPS will get hot especially if it isn't air cooled. If you have a glass cover, you can get closer. But yes, I'd keep it 20" away at first and keep an eye on the plants.

i am going to get a duct on it but not a cover