I’m looking at removing my current USA leds and putting T5’s on my 40 breeder. What would be a good light I have been looking at the ATI fixtures in the 4x36 and the 6x36. Any info would help. Thanks.
Get the 6x36 ATI Sunpower...........you don't need dimmable If you want save some cash you can buy the LET fixture kits or the Reefbrite T5 units. I'd also check the used section on R2R for ATI or Geismann units.
I don't know what ballast is in the Reefbrites..........I'd probably call them and ask.
Doing diy also gives you some flexibility in the future with LED or other lighting combos.