The present invention relates to a portable light pen dispensing device (1) comprising:a housing (11, 12),an electronics module (2) located in said housing (11, 12) and comprising a light source (23) capable of irradiating skin and stimulating regeneration of the skin to treat skin disorders,a battery (22) for powering the electronics module (2),wherein the light source comprises one or more LEDs, wherein the electronics module (2) comprises drive means (26) arranged to control the operation of the light source (23) to emit light in a mixed driving mode so as to limit the temperature of the LED (23) while ensuring a sufficient fluency allowing for the skin to be treated.
