i don't spend to much on lights as you could tell by my $20 expense on a shop light...i haven't seen a tanning light used on a silver, but there was a thread a while back that mentioned it...as for natural light being better then artifical...well it all depends on who you talk to...we are tring to replicate their natual habitat in our homes so in that reaspect yes...you will have a hell of an algae attack though so get a good "cleaner" if you don't have one, be it fish or scrubber...i tried a black light, didn't really see much though my light wasn't the best..(covered in glow candel wax from my stoner days)..i took it off out of fear that the wax could fall in an my fish could eat it...if you have a black light try it and see what you think...personaly i like the sunlight as i use hydroponics so it helps on more levels then just color...
