You can get actinic and/or lunar lights. Many fixtures now include lunar lights, and actinic can either be put in separate fixtures or included 50/50 in multi-bulb fixtures. These usually offer separate power cords to allow you to control them separately.
Lunar lights can be used at night to simulate moonlight, and with the room lights off give you just enough to be able to observe your inhabitants. Many people with actinic lights put them on a timer to come on an hour before the white lights and stay on an hour after, to simulate dawn and dusk. Some have reported that corals react better to this than having the bright day lights pop on.
I don't have much in my tank yet, but my night snails get active with the dusk-simulated actinic only lights.