I'm a Beardie n00b. Anyway, I was wondering if beardies need nighttime basking bulb, in addition to their daytime one? I can't imagine leaving the daytime bulb on 24/7, as this would probably disrupt their day/night cycle.
No, they need no light at night. Their lights should only be on for 12-14 hours and off for 10-12 hours.
You are correct about light at night, it can disturb their sleep pattern.