<a href=showthread.php?s=&postid=13269797#post13269797 target=_blank>Originally posted</a> by seaspy
Hi, I'm pretty new to this site, but I see that Grim Reefer is the resident expert on T5 lighting so I'm hoping he or someone with comparable experience can answer these questions.
First, my grandmother has a 65g flatback hex with 2x48" and 2x36" Tek retros. Her bulbs are ready for replacement and I was wondering what you would recommend. Currently, she has 2x54w 11k Aquablue, a pure actinic+ and an actinic+ Geissman bulbs(I think these changed since she bought them, but they are both blue, one more than the other).
Next, I just upgraded to a 125 (72x18x25)from a 55. I currently have my old 4x54w Tek retros on the new tank until I can get some 80w (or 72" retros if these are made now). They're set up in a staggered pattern to reach the full length of the tank kind of like having 2 72" lights with a 2' overlap in the center. I'm running 2 11k Aquablue and 2 Pure Actinic+ Geissman bulbs. They're ready to be replaced as well, what should I replace them with and when I get the money to upgrade, what should I go to?
Thanks in advance.