question from noob

Hey guys im getting a 150w HPS and will be keeping it in an enclosed closet.Does this size light get hot?I can put a 4" flange on it and 4" inline air duct on
it if need be to cool it down What do you guys think?

Yes it does get hot, You will def need to cool it down, especially in a closed closet. You've got to vent that closet.

I run 400 watt in a closet along with a 200 watt equivalent cfl, and it for sure needs to be ducted. I bet you can live without on on a 150, depending on closet space however. If you have the ability to duct then I suggest you do it, helps the whole grow process.