“Full spectrum” it is f##ing marketing! They try to f##k your mind!
For aquarium just use cold white 5000-5700k leds, because also you need real color of your fishs and another citizens of the your personal little water world.
my lamps also for aquarium — 16-54 ватт для аквариума
review in BLF here — Review: SunLike18LD IP67 LED lamp (4200K, CRI98)