Lighting

Greeting refers. Been a long time since I have visited, but thought if anyone could help this would be the site to reach out to.

So I am in the initial phase of planning a new tank. It will either be a 220 or 265. I have everything planned with the exception of lights. I currently have five AI Sol Blue fixtures that have served me very well. I have four over a 90 and a fifth on the shelf.

Question #1 is if I decide to use the sols on a 72" tank could I get away with five or should I go to six? The tank is braced, so I am thinking every 12", which would put me at the same light spread I have now.

Question #2 Would mixing in Hydra 52 present any issues? I have a 25 gallon where I use a Prime HD and I like the look, but don't know how well the two would mix.

If I go with the 265 I am going with a full replacement.

Thanks for any help or advise in advance.