Also at the risk of hijacking (hope you find this interesting too
@Sanj997), but to share some thinking....and remind anyone who cares that this is not a religious issue, just thinking out loud. (You asked for it!)
To me, there's nothing wrong with halide. Or T5. Or LED's.
You could easily find a dozen beautiful tanks grown under nothing but pure instances of each form of lighting. (Let me know if you need help!)
From that point of view, it makes little sense to combine them – just decide what you like!
It's really as simple as that, but for those, like me, who have trouble with simple...keep reading.
Also from my point of view, the idea of combining them or "hybrid lighting" (ay....marketing buzzwords) comes from the old days when halides were the only lights bright enough to get the job done, but their color was pure-daylight or worse. Ugly....and not very effective. They didn't look as good without Phillips Actinic .03 T12 tubes to bring extra florescence out of the corals. (Turned out that blue light was really good for their health too!)
That's that pattern after which most of the halide fixtures were built through the 90' and a chunk of the 00's....a row of halides braced by T12's, then power compacts, then eventually T5's. Everyone made one...Coralife, Hamilton, Aqua Medic, Geiseman, you name it...some still do make them. Hamilton Technology's new
Koro Sea Sun™ 3600 LED Light ($599) is an all-LED adaptation – how do you like that for an argument-buster?!
Thing is, during that timeframe, the Radium 20,000K halide bulb became popular...along with many other "blue halide" bulbs.
Actinic had come to the halide bulb itself! The need ceased to exist for the "extra" side lights even if all those thousands of halide+florescent fixtures did not cease to work.
Cost usually becomes a factor with hybrids as well. If you are not on a budget, many things are different from when you are. Your feelings about hybrid lighting may be one of those things.
FYI, combining
Stage lighting instrument's is normal and might be considered a parallel model for us except for one thing....they don't combine instruments because of some perceived defect in one of them, they use them deliberately for effect. Our "defect" = effect, or effects. If shadows aren't desired, a spotlight would not be used, for example.