Yes, room is dark during daytime, and lights are on at night time.
Benefits:
-Lower electric rate.
-Able to keep room temps in high 70's - low 80's during light period - night time
-Able to have a night time drop to around 65 degree - daytime
-Don't have to run a heater 12 hours a day - which dries the air and humidity up.
-Able to maintain high humidity with the use of drippers and auto-misters, in the dry months of winter here.
-I work long hours (leave for work around 6:30am, home around 7:30pm), so able to maintain chameleon much better. Able to feed, clean, hydrate, before going to bed, and also wake up a little early and catch any maintenance needed before they start to hunker down for sleep.
Once the night time temps warm up here (usually by last week in April), everybody gets flipped back to go live outdoors and soak up the natural sunlight as the days grow longer.