Blue light allows the nocturnal fish to be seen doing what they do best when the lights go out.
Blue led moonlight fish tank.
Diy led moonlight fish tank mod.
So called moonlights smallish aquarium lighting fixtures that emit a low intensity usually blue light have been popular with reef aquarists for some time.
Increasingly internal timers in high end dimmable led units can be set to automatically regulate the transitions between day and night.
This is particularly good for nocturnal fish as a dim blue light can be left on the tank to simulate moonlight and allow for feeding and viewing purposes.
My tanks have a 2 hour blue light faze before the light goes out totaly.
Mlj led aquarium light 7 44 inch waterproof fish light white with blue rgb underwater lamp submersible led light for fish tank 4 4 out of 5 stars 475 9 99 9.
Led lights can be dimmed and programmed allowing for a natural dimming at sunset and the reverse at sunrise.
I don t think i would leave it on permanent as the active fish during the day stay active as well.
Buy products such as 12v 50cm car 36 led smd interior light strip bar lamp van caravan lwb fish tank at walmart and save.
Nicrew classicled gen 2 aquarium light dimmable led fish tank light with 2 channel control white and blue leds high output 4 6 out of 5 stars 1 003 29 99 29.