bruce 1;880470 wrote: I have 4 of the Photons (only mine came from the factory so they are called something else (I think IT2040)) Great color, They have true heat sinks in them unlike some of the other units that are out there. For the price that is good. It is a great built light. I keep RBTA under them with no problem. I have the power cut way back on mine. The manufacture is great to deal with (Evergrow) I did have a warrantee issue with mine when I got them but they sent me the new parts in just a few days to fix them. I have read that ReefBreaders is great on the warranty also. Get on Reef Central there is a very good link on the lights. It has been split several times now because of it being so long. Lots of great information on the lights there. If you order from the factory you can get custom color/spectrum. You will love the lights.