The sunrise sunset depends on the fish you keep and room. A room that has a large amount of ambient sunlight or similar probably doesn't need sunrise/sunset. Certain fishes that are not easily spooked also probably don't need sunrise/sunset. My wild caught discus can be easily spooked just by turning on the room light so there is some benefit to ramp-up/down with them. For most pleco i own i actually don't care if they get spooked because they aren't going to ram into the side of the tank looking for a cave to hide. My point: there is no right answer here - however most medium level to high end lights are gonna have the feature. It cost very little or next to nothing. The only moderately strong aquarium light i know without the feature is aquarium-coop which is basically a fluval plant 3.0 without the ramp up/down feature. It is dimmable since it has intensity setting so adding the logic to actually ramp up/down should have been pennies on teh dollars.
Anyway on the medium high-end my favorite light by far is the ai blade. I haven't found a low end light i like yet (i don't like the colour tones of the hygger or low end fluval) - i might give the jcp a try but i'm kind of picky about the quality of light. I have tried or own the following lights:
fluval plant 3.0 (tried lower end models - + strong enough, ip68, 3 year warranty - not super strong - slight yellow tint)
ai blade (no ip68, usually 1 year warranty, stronger tha fluval but not super strong)
ghl Lx7 series (pain in the ass to use, insanely expensive)
wrgb 2 (very strong, some reliablitity issues reported with blu-tooth module, expensive, very strong blue tint, no white led - the chiros wrgb 2 pro and weak are suppose to be more neutral in spectrum)
hygger - the light balance is weird kind of a pain to setup - has ip68 and very cheap
onf - kind of expensive only fits rimless tank but i did get it to fit 40 breeder - only one size and not adjustable width but nice tone - kind of a specialize light if you don't hang it.
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lights i've not used but people recommend on low end
beamworks
current
(i have no reason to believe these are better or worse than the hygger - all come in multiple models with +/- features).