A CERAMIC HEATER FOR BEARDED DRAGON will keep them warm, but since they are non light-emitting will not disturb them at night.
The type of heat produced by these ceramic heaters will help you keep the temperature on the desired temperature for your beardie.
It is in most cases enough they use a 100 Watts, but there are also 60 and 150 Watt bulbs available.
I have looked at several sites to help you find the, what I think, are the best and most affordable bulbs for your terrarium.
Have a look at them and let me know if you like our choice of best basking light for bearded dragon. They can also be used for other animals of course.