I'm not sure how many people were around when what I'm asking occurred so I may not get an answer. Back when everyone was running T5s and halides a company came out with a led light fixture, one that fit all the way across the tank. I don't remember their brand name. I believe they were the first to commercially do it, everything else seemed to be DIY. After about a year I read that they are being sued for patent infringement. Apparently someone/company had gotten a patent for a led light over an aquarium. It seemed to be all encompassing and they won the suit and the led company went under. As far as I know the company with the patent never actually made a product and were just asking for license fees. That made me wonder if all these led lights out today are having to pay that company a license fee. Or am I remembering all this incorrectly and there never was a license fee that had to be paid?