First-time floaters may have a few fears or anxieties about the experience; being naked can make you feel a little vulnerable or claustrophobic, but remember, the room is private and locked by you. You are in control of the lights and the lid, so if leaving the lights on and the lid fully open works, then great. A closed door and lights off enhance your sensory experience, but it is not required. We know that by your second or third float, you will want to close the lid and float in the quiet and darkness.