Which way to position bulb in a/c hood?

Shroominnm

Well-Known Member
I have 3 600w hps a/c apollos in the room, and as I'm installing the third one I'm noticing that I have them hooked up 2 different ways.
When I say this I'm referring to the way the the bulb is facing. On 1, the outlet for the bulb is on the side where air enters.. on the other it is on the end where air exits the hood.
The one set up with the outlet on the air entrance side seems to stay cooler, but it's closer to the fan and it's in the room that gets the air conditioner first.

What is the correct way to do it?
 
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