Iv recently bought a orca TL450 marine tank and it comes with some blue moonlights , do these need to be on at night all the time after iv put the main lights off .
your choice, i have mine on all night, and the fish "sleep" (maybe more specifically slow their metabolisms down). Plus it lets you look at your nocturnal specimens in your tank.
Hi, its up to you really, i usually sometimes leave the light off in the day and leave it on at night or leave it on in the day and off at night so it doesnt burn it out.