For PC lights, AHSupply for T5s Tek. Best reflectors period. If you insist on DIY, carefully laid & glued mylar sheeting may work a little better than high-gloss white paint. W/ either DIY treatment, you will be directing a lot of light through and out of the tank whereas light is directed down, toward the bottom of the tank w/ good, parabolic reflectors. Look at the AHSupply www site for more.
