A tanning or a phototherapy system including a light source including light emitting elements configured to emit ultraviolet (UV) light having different peak wavelengths, a controller configured to control luminous characteristics of the light source, and a sensor configured to sense at least one of the luminous characteristics of the light source and a users skin condition, in which the luminous characteristics of the light source are controlled by the controller based on the users skin condition sensed by the sensor, and controlling the luminous characteristics comprises increasing or decreasing luminous intensity of one or more of the light emitting elements.
