A bit of back ground 1st. I'm not a great sleeper, normal awake time for me is from around 8-9 am till 5am. The snake is in the same room ( Living room ) as me and the lights go on around 3pm till i go to sleep.
My wondering is if this constant light will affect Snakie day/night cycle and if so is it bad for him?.
If it worries you, you could use just a small light at night, or put a cloth over his vivarium later in the evening ( after you enjoyed his evening roaming session, of course :-) ). That way he'll get some darkness ( one of mine only comes out when it's dark ).