here is the other one Shadetree,
this is what I was talking about.. by using white paint or hammer tone or plain aluminum flashing you will not get as much light as using a miror type but you will be able to get a more even and consistant lighting throughout the tank.. but in the same tolken you will not get that high light area whare your SPS will thrive while the rest of the tank is not quite as intence. it is a trade off for what you want I guess, I personaly am using a spectral reflector on my floressent type bulbs and I will use hammer tone on my MH when I get them to TRY get the same intensity everywhare in the tank.
Steve