10 Light emitting devices (LED) dental trays or occlusal splints for cosmetic purposes, namely, dental bite trays; Light emitting devices (LED) dental trays or occlusal splints for therapeutic purposes, namely, dental bite trays; Light emitting devices (LED) mouthpiece for cosmetic purposes, namely, cosmetic orthodontic appliances, cosmetic orthodontic retainers, cosmetic orthodontic braces, cosmetic orthodontic brackets, dental cosmetic rubber bands and cosmetic orthodontic rubber bands; Light emitting devices (LED) mouthpiece for therapeutic purposes for treatment of tooth position, tooth color and tooth decay; custom self-service or at-home kit comprising dental tray, in particular thermoforming dental tray, or occlusal splint being bite trays, in particular loaded with bleaching preparation, and tube loaded with bleaching gel; custom self-service or at-home kit comprising dental tray, in particular thermoforming tray, or occlusal splint being bite trays, in particular loaded with bleaching preparation, and tube loaded with hydrogen peroxide gel; custom self-service or at-home kit comprising tray, in particular thermoforming tray, or occlusal splint being bite trays in particular loaded with bleaching preparation, and dental bleaching pen; dental trays or occlusal splints for cosmetic purposes for use with light emitting devices (LED) namely, dental bite trays and dental rubber bands; dental trays or occlusal splints for treatment of snoring, tooth position, tooth color, and tooth decay for use with light emitting devices (LED)