I've upgraded two of my AI SOL SuperBlue fixtures that hang above my 55g tank to Hydra. From reading online, it seems Hydra pucks have a very broad spectrum and include UV/Violet. It's also now wireless with AIs wireless controller (which is kind of crappy), but can also work with upcoming AI Director. I took some pictures during the upgrade, figured I'd share if someone is interested: AI SuperBlue cover off, board removed: Old SOL Superblue 3 LED pucks removed (Blue, Deep-Blue, Cool White): SOL -> Hydra upgrade kit in a box: Ooo, shiney: Hydra upgrade kit: New 5-led pucks (two middle pucks have red/green/uv/violet leds, two outside pucks have cool white, blue and deep blue): Mounting new pucks: Installing new board (note the wireless add-on card up top): All done: I'll post some tank shots later and my impressions after a few days. Cheers.