Noticed that when I use my infrared bulb at night on the timer for 1 hour, the sugar gliders will hide in their nest for that hour - obviously they see 'light' just not it's color.
SO, last night I switched to this Exo-Terra Night-Glo Moonlight
75W Lamp pointed at the ceiling. The bulb simulates natural moonlight to allow nocturnal viewing without disturbing the animal's day and night cycle. The light emitted is bluish due to the use of blue glass. The heat generated by the bulb is minimal but enough to help provide tropical night time temperatures, used typically for reptiles, and they LOVED IT! One kept reaching thru the bars at it like it was trying to check-out the new thing...
I've placed it on a 1 hour timer twice daily - 9PM and 5AM - when they're getting up and going to bed. They play gleefully while it's on