Lighting opinions please!

[Son Of Skyline]

Hey everyone. I'm currently running my 27gal (18" tall) with a single 175 10000k MH with a simple reflector. I am planning on upgrading to a 48gal which I just recieved (thanks Pocilopora!) but I'm wondering about the additional length of the tank in relation to lighting. The depth of the tank will be about the same in the 48 gal, as I'll be adding a 6" DSB as opposed to the 4" DSB in my 27gal currently.

If placed in the center of the tank about 8-12" above the water, will that single MH bulb be enough to provide light in the outer edges of the 36" tank? If not, is it possible to get a reflector that will do the trick? TIA [img]smile.gif[/img]