The level is a strength rating. A higher level means stronger lamps and a shorter session for the same result — a Level 5 bed does in minutes what a low-level bed takes most of half an hour to do. That is the appeal, and it is also why the single most common mistake is treating the first visit like the tenth.
Come to the desk before your first session and we will set the length for your first few visits. Lotion is at the counter — the beds work considerably better with it and considerably worse without, and dry skin is most of why a first session disappoints people.