I think the big difference in these and what's currently on the market is the ability to hot swap them and not having them directly wired into the wall and the price is a little high but not when you look at how many years you can have them running for versus the cost of t5 lighting bulbs
hot swap? as in plug and play? that's exactly what ours is. we took out the old t5ho bulbs, put in these led replacement tubes. and we were good to go. nothing changed. the idea that these leds are so expensive is beyond me considering they don't even come with a power source (the idea is your t5 fixture provides the power so obviously they don't need them) yet theyre potentially going to sell for the same price as a full blown setup. consider most people with a 48 inch tank run 4-6 bulbs. we will work with the cheaper aspect and say they only have to swap out 4 bulbs at 60 a bulb. that's 240 bucks and you still have your old t5 fixture. or you can take 240 bucks on and buy a set of blackboxes with timers, have more wattage, more coverage, and save about 80 bucks. or get a set of programmable blackboxes for about 20 bucks more than the t5ho-led bulbs and have everything new with warranty.
I love this idea and would love to see a proper t5ho-led bulb hit the market for the reefs, but the cost would need to be competitive. and, while this is new tech for the reef world and prices could drop in time, right now the projected prices just aren't competitive. the price of leds and led tech is dropping rapidly in every aspect, but we allow the prices to stay high in our hobby.