Yes u can add leds to ur fixture . Current has a bunch of stuff ones called truelumen led strip u can mount them right to ur fixture . Ecoexotic has its stunner strips that can b mounted anywere as well and bolth of those r only fifty bucks or so. Just google it or u can go the total retro build and drill holes and install singke ones as well but for fifty bucks from marine depot u canbget either of the two i named and just mount them werever theres enough space on ur fixture or u can get just a single strip that has legs and will sit behind or in front of ur current fixture u have now. I hope this helps u . I have 2*96 w pcs on my 39g and a strip with three rows of leds on my tank and all tigether its bright abd looks amazing and my corals grow like crazy and my btas love all there lights too but sometimes i feel bad for the fish cuz i know if i was in there id b running into everything cuz its so bright and i cant find all the fish sunglasses