The only light that reptiles can't see is infrared light, so you would need to use a red infrared bulb for viewing at night if you don't want the gecko to be able to see the light (thus staying asleep, hidden or mostly inactive). Just be careful that the bulb doesn't heat up the cage too much, because infrared bulbs do emit heat--you want to keep it under 80 degrees in his enclosure. Usually ambient light is enough for a day/night cycle so you don't really need any other lighting.
Young babies may not seem to fire up too much if they are in their dull phase and haven't started to get their adult colors in yet. Some babies do fire up some, but some go through several months where they don't change much at all. A good way to get them to fire up is to mist heavily and then turn out the lights so that it is completely dark. Come back in 15 minutes or so and you should have a fully fired up gecko. The combination of humidity and darkness tends to do the trick almost every time.