400w MH

I just picked up a 400w MH light and I was curious if I could just aim a fan at it to keep it cool. Its in a closet but its a rather large (for a closet) - I'd say 6x6 space. Also, what happens to the light if it gets too hot? Explode? Fire? THanks!

A 6x6 space is actually a little too big for a 400 watt light.

And the bulbs don't have to be air cooled, people use ventilation to keep their grow room down because the light makes the room hot. They will not explode from getting hot, although DO NOT get water on them. I have heard of people misting their plants and hitting the bulb and it would crack, never heard of one exploding.

You are going to want a fan in the room regardless of if you want to air cool the light. Good circulation and strengthens the stems of the plant.

yes you can point a fan directly at it, depending on your temps, you can do more damage keeping it too cool and never letting the bulb reach operating temperature than worrying about it being too hot. They burn these things in steel plants, they have proven themselves durable. I doubt you get it hot enough to worry about, I'm sure the ballast would fail or the bulb would quit working before you have to worry about it exploding. I believe the glass is designed not to break if the bulb does explode, the insides will be destroyed but the chances of having the glass itself explode is pretty rare.

mh bulbs implode not explode