All that I can do is offer my experiences, observations and opinions. If nobody wants to consider them, then so be it. The only Photon V2 tanks that I have ever seen that work well with SPS have them up a few feet with the channels all at 100% - these are few. I have seen many, many more fail, get T5s added and then replaced with other units or even more T5s. If people cannot see that a few "easy" sticks in a mixed reef is not the same as a SPS dominant tank, then we can just agree to be watching different games. I gave the only example that I knew of a really nice SPS reef with V2 photons - therman's tank. I have seen a lot of nice mixed reefs with Photon V2 lights that have a few SPS in them here or there. I recommend Photon V2s to people who want mixed reefs since I like the coverage and less shadowing... I just think that you can do way better for a SPS and acropora tank (this is the SPS forum).
Kessils are underpowered and you need a ton of them beyond having a small tank. Period. They also shadow a lot as colonies grow. You see nearly all of them get added to Aquatic Life Hybrids and then the owners are more happy. Again, talking mostly about SPS only and dominant tanks here, not a mixed reef.
I would like all of my haters to spare me the PMs and stuff since I never once mentioned any other light type than LEDs.