I don t think i would leave it on permanent as the active fish during the day stay active as well.
Blue led moonlight fish tank.
Got 2 led bars with 30 led s on each one white the other in blue from amazon add a 12v power supply and a 2 way switch put it all together in less than a hour.
My tanks have a 2 hour blue light faze before the light goes out totaly.
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.
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 547 9 99 9.
Buy products such as 12v 50cm car 36 led smd interior light strip bar lamp van caravan lwb fish tank at walmart and save.
Shop for led aquarium lights in fish tank aquarium lighting heating.
Blue light allows the nocturnal fish to be seen doing what they do best when the lights go out.
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.
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.