The SOLIUS machine is not a tanning booth. Tanning occurs when UVA rays trigger melanocytes to produce melanin, the brown pigment that leads to tan skin. These UVA rays cause damage to the deep layers of the skin that can lead to premature skin aging and skin cancer. SOLIUS has isolated a tiny spectrum of UVB light that triggers vitamin D production in very surface of the skin, while removing those harmful UVA rays. Therefore, you will not get a tan from using SOLIUS.