Another reason that people tend to run lights at night is to keep the temperate up.
Bearded dragon uv light off at night.
With a constant background temperature and lighting period this tends not to stimulate brumation hibernation in the bearded dragon.
Instead the basic setup is 12 hours on 12 hours off for both uvb and the basking spot light bulb.
During the summer months you should provide your bearded dragon with a minimum of 14 16 hours of daytime light and uv exposure and 8 10 hours of nighttime exposure.
In a bearded dragon vivarium you ll have your basking bulb down one end so the reptile comes to associate heat with that end of the viv.
Simply put you re bearded dragon s tank shouldn t have any lights running at night.
If you tank temperature falls into the 60 s at night invest in a ceramic heat emitter instead of running the lights 24 7.
However you can slightly change the times when your bearded dragon sleeps by turning lights on off at specific times.
Bearded dragons do not need light at night.
Bearded dragons do not need a source of uva or uvb at night.
If your house gets cooler than that at night like 62 or below you might want to use a low wattage heat lamp to bring the cage temps up a bit.
If the room where you keep your lizard only drops down into to the low 70s or mid 60s f at night then you might not need any nighttime heat.
During the summer provide 12 14 hours of light heat and in winter around 10 hours.
As such you ll want to turn both their heat lamp and uvb off at night.
During the winter months the light cycle should be decreased to 10 12 hours of daytime light and uv exposure and 12 14 hours of nighttime exposure.
Ceramic heaters emit a nice infra red heat but as they are non light emitting bulbs they won t disturb your reptiles at night time.
12 12 hours in summer should work well.
In summary bearded dragons do not need heat at night either unless the room temperature drops at a significant rate.
Bearded dragons are diurnal lizards so they are active during the day and sleep at night.