<a href=showthread.php?s=&postid=11416169#post11416169 target=_blank>Originally posted</a> by chrisstie
I own a red sea max and concur - they are PC lights in the diameter of T5 - t5 is just a size of a bulb (t8, t12 etc you can find at chain pet stores for other aquarium uses and are all differently sized)