How close is too close guys?

[Voltrom]

How close is too close?

Using a 250w 7200K MH system. I believe 19,000 lumens total. If I'm right these plants are just being surrounded with amazing amount of lumens.

Your thoughts? Using a 5 gal dwc cooler.

 

[Hosebomber]

I cover this in the link in my signature. Basically, hold the back of your hand under your bulb and slowly move it away until the heat stops being intense... That is the closest you want the top of your plant. 2" is probably too close.

 

[JJ Bones]

I agree with Hosebomber, one thing I've started to do is use the inside of my forearm rather then my hand because I find our hands to be tougher then the inside of the forearm.

 

[Voltrom]

Totally agree with the hand technique, I did that with this setup. I have a fan directly on the ladies and I also have an extraction fan mounted on the 250w light. So it's basically pretty cool in my little closet. I did a test last night with one of my soil plants and I literally put the plant top within an inch and a half of the bulb. It was inside the hood... The next morning the girl was fine so I'm just learning the limits. I know 250 doesn't produce alot of heat so it's really the perfect light for vegging clones. Ambient temps honestly are the most important factor and at night I get the room around 65-70 and the closet is usually 75 at most at night.