I use Chinese panels, LED
Group buy and RapidLED.
Inexpensive, Bridgelux LEDs
Lots of light, grows all corals.
Dimmer versions are best
Hard to control with a controller
Drivers are their weak point, but easy to exchange the driver to repair.
All in all a very good way to go.
Group Buy LED
Inexpensive, Cree LEDs
Grows corals great
Dimmer versions that are controllable are pretty standard
Can be customized for your tank, length, brightness, LED
mix, lenses, etc.
Build the spectrum to suit you.
You have to be able to solder and do basic assembly.
I will be changing my Chinese panels out for custom fixtures I will build using these guys.
Onyx fixtures are very nice, Cree LEDs
Grows corals fine
Dimmable and controllable
A bit more expensive, maybe 20%
These various LEDs are what I have serviced and used for the past years since abandoning MH