i getting ready to DROP Bank of America...i have had an account with A+ Federal Credit Union for 5 yrs now and thats where im taking all my $, what i have left (used to be A+ Teachers Federa Credit Union)
100% and just gradually ramp up the time over a few weeks. I started my tank with the frags getting blasted with over 1300Ws of light and didnt have any problems. But since ur tank is established i would graduate into longer photo periods.
The bulbs aren't designed to be manipulated. I know of someone who had there 400s turned down to 250s and it ruined the bulbs. IMO the 20Ks will be whiter when they are at 400Ws. I have 20Ks and they look fine.
be VERY careful with the screen...DONT get it to close to the fixture, it will dry up and become brittle (and will make the tank a mess) it works though. I run 2x400,2xVHO, and 8xHOT5s. 400s are very hot.
also when u buy a lense make sure its a MACRO not micro. big difference. i may be selling my macro for nikon since my son threw my body(nikon) in a bucket of salt water.
LiveAquaria will email u when they get them back in stock, they had smalls about 2wks ago.(possibly with a warranty) I ALMOST pulled the trigger. And yes u r correct Clynt is the only one i know of who has one. Its hard to believe in 2008-2009 they sold for $69-$149. Now $250+ I also like the sunburst and fathead.