Need help wireing and mounting 2 MH's

Is there any thing I should know when wireing my MH retro kit.
I have an IceCap ballast.

I am trying to decide how to mount my MH retro kit. I have a 100 gal with this canopy. I will have 2 250MH mounted in this canopy. If I mount it like in the first pic I am afraid of having a bad shadow in the middle but I can mount another light in the middle something like a 175 MH or some type of PC or T5. In the second pic I dont think I will have room to mount another light in the middle.

Should I mount it like the first pic or the second?

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Just noticed your thread...

Actually, if possible, you generally want MH bulbs mounted perpendicular to your tank, not parallel to it. The bulbs throw light to their sides, so with it mounted parallel to the tank, a good chunk of your light is being thrown out the front and back of your tank.

Is there room to mount the bulbs facing back to front? That way it's throwing more light into the tank where it'll do the most good...
 
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