 There are many other variations of low-pressure tanning lamps including 26 watt, 80 watt, and 200 watt to name a few.This is one of the most confusing aspects of tanning lamps in North America, as lamps in the US are not rated for their total output, but rather their ratio of UVA to UVB.Most people could be led to believe that a 6.5% lamp is stronger than a 5% lamp, while both lamps might have the same total UV output (or the 5% could even be stronger across the spectrum).