no bulb replacement would be awesome. I'm yet to see a LED powered tank that blows me away though.That's what I use to run on my tanks, MH + T5 supplements and LED moonlights... I had to use some sort of cooler/chiller. When I switched over to T5s, just a sump fan was good enough. I figure with LEDs, don't even need a fan and never have to replace any bulbs for 10 years. That's kind of a nice thought... :clap2: