Metal Halide Lamp
The higher values of UVB do initially cause the body to produce more melanin for a good tan,
but the skin’s defense mechanism causes the skin to thicken to provide protection from the UVB. Also,
the damaged skin exfoliates so the tanned look quickly disappears. Gentler UVA rays provide a healthy looking
tan in as little as three 15 minute sessions with no protective thickening of the skin and no exfoliation,
which can last for two weeks or more.