Which way to install air cooled reflectors

I tried searching the forum first and couldnt find an answer to my question. This is my set up - 2 hydrofarm radiant RD8AC 8" air cooled reflectors with 2 1000 watt HPS bulbs. The reflectors have angled polished aluminum on all sides. The room is 5' deep by 7' wide. 2000 watts of lighting equals 57.14 watts per square foot.

The air flow is blowing thru the reflectors in a left to right direction like this with the exhaust on the right side.

(fan)-----(bulb)----(bulb)----(exhaust)


I installed the reflectors end to end with some duct between them. I put the ends with the sockets in the middle so that the bulbs face in opposite directions like this

The arrows are represent the sockets

(bulb)> <(bulb)


Or should I rotate both reflectors so that the sockets are on opposite ends and the bulbs face each other like this?

<(bulb) (bulb)>

Or should I rotate this way?

<(bulb) <(bulb)

I want to know if this will decrease the WPSF in the area below the piece of duct or will there be enough overlap from the 4' by 4' primary areas. I've seen other rooms where the bulbs face the same direction and wondered if i installed these wrong or does it even matter. It just looks odd because the Hydrofarm nameplates are one on the front and the other is on the back.

Thanx for your time and any help is appreciated.

I asked a guy at my local hydroponic store, which is 3rd st hydroponics in Oakland, Ca., and he says that the only concern is that the sockets might rattle if the air blows past the bulb first. I didnt notice a rattle.

The arrows represent the sockets.

(fan)----(bulb>)--(<bulb) this will rattle a little bit. This is how I installed them.

(fan)----(<bulb)--(<bulb) The hydro guy likes this way. No rattle.

After almost 100 views I'm posting this because someone else might need the info.

Thanx

would a three lamp setup of radiat 8s, work ok like this?

<--Air--(exhaust)-(fan)--(bulb>)--(bulb>)--(bulb>)-(filter)--Air<--

In this case the fan would be pulling the air instead of pushing it.

Thanks! That rattle was driving me nuts!