Light-based medical devices for treatment of skin, namely, light emitting diode devices for medical, surgical, dermatological, plastic surgery, and cosmetic treatment of the skin, face, and body and for increasing human body's own production of collagen; Laser apparatus for medical, surgical, dermatological, plastic surgery, and cosmetic treatment of the skin, face, and body; Laser diode apparatus for medical, surgical, dermatological, plastic surgery, and cosmetic treatment of the skin, face, and body; Intense Pulse Light (IPL) apparatus for medical, surgical, dermatological, plastic surgery, and cosmetic treatment of the skin, face, and body, namely, light based devices providing mainly pulsed light for performing non-ablative aesthetic skin treatment procedures; Light-based medical devices for treatment of skin, namely, light emitting diode devices for increasing human body's own production of collagen and for ablation, vaporization, resurfacing, and coagulation of soft tissue; Light-based medical devices for treatment of skin, namely, light emitting diode devices for increasing human body's own production of collagen and used in procedures to treat melasma, striae, scars, acne scars, surgical scars, hypertrophic scars, wrinkles, rhytides, furrows, fine lines, textural irregularities, benign pigmented lesions, vascular lesions, epidermal nevi, actinic cheilitis, keloids, verrucae, skin tags, anal tags, keratoses, tattoos, and in procedures for debulking benign tumors, debulking cysts and treating superficial skin lesions; Light-based apparatus, namely, light based devices providing pulsed light for performing non-ablative aesthetic removal of unwanted hair for permanent hair reduction, and for treatment of pseudofolliculitis barbae (PFB)