No. In pet stores the fish do not have lights on 24/7 as you said anyway,
Fish do not have eyelids so they cannot shut their eyes to sleep, this means they need pure light to see and pure darkness to sleep.
I keep the light on for something like 6-9 hours per day and leave the light of at night so my little fishee wishee's can get some sleep. Its good for the tank to look pretty as with the lights but just think; if you had to try and sleep with lights beaming down on you??
Hope this helps
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also if you have an aggressive fish (like i do) ex Florida gar fish, piranha or Oscar leaving the light on 24/7 can irritate them and actually make them more aggressive
When operating a powerboat at night white light should be shown on the stern and red and green lights on the bow.
ANY boat on the water at night must display three lights: A green light starboard (on the bow) a red light port (on the bow) and a white light on the stern, mounted higher than the bow lights.
A car parked alongside a highway at night should have their parking lights on.
The Park lights or your hazards
Get a night light, sleep with the lights on, or grow up.
To help see at night
As long as you purchase quality lights, your solar patio lights should provide adequate light during the evening hours.
Night lights are necessary and safe in baby nursery. Care should be taken that these light are pretty dim and of soothing shades like blue and green. Only indirect light should fall on babies face. The bulb, shade and switch should not be within reach of baby and shade should be of unbreakable material.
The anchor light at the top of the mast should not be used by a sailboat underway at night. Frequently it is left on when leaving an anchorage along with the steaming and navigation lights.
NO
Navigation lights, green starboard and red port. Masthead and stern lights should be white
depends on the size of the boat, but at least a white light to the masthead.