If they are in full brumation, you can either leave all lights on, turn the basking bulb off but keep the UVB on, or shorten the light cycle. If they are in semi-brumation I would leave all lights on or shorten the cycleDuring this period is it required to leave the lights on or just adjust the temp so it is not as hot for them when they start coming out and become more active
A lot of people leave the lights on.If they are in full brumation, you can either leave all lights on, turn the basking bulb off but keep the UVB on, or shorten the light cycle. If they are in semi-brumation I would leave all lights on or shorten the cycle