Need LIGHT Help

Ok I have 9 sativas that are about a week in to veg grown from seed second growth is starting on all So, how close can I have my light from them without hurting them its 1000w and I do have it air cooled and an additional fan blowing on the??

put ur hand up if it to hot then move it up the rule to green thumb if it not comfy then it goes up mate

thx for the agree the rule to green thumb a real grower know all he need to know but always new things to new and try

Alright thanks for the info guys.