I picked up a couple different ones. I haven't had a chance to put it all together yet. But the one that fits the best I got from ebay and had to wait a couple weeks for delivery since it came right from China. I will have an extra since it came in a two pack...but I better get mine going before I offer it up just in case I have a problem. I also picked one up from super bright leds but the size of that one is a little smaller (although it still fits on the bottom of the kessil 350/360).

I also purchased a dimmer intended for led strip lights that accepts a 0-10v input signal. So my plan is to connect it to the V3 port on my Apex to control intensity. I imagine these will also shut off at 10%...but hopefully will appear dimmer than the kessil's lowest setting.

I plan to get it setup in the next couple weeks. I'll be working on setting up my new tank too.