Check the listing for details. Tesler Lamp Dimmer 80P40 NEW In Box. Condition: New. Listed at 15.99 USD. The Tesler Lamp Dimmer 80P40 is a brand new in box product designed for controlling the brightness of lamps or lights in a home or office setting. This dimmer switch has a simple operation method, making it easy to use and adjust the lighting levels to your desired settings. With its model number 80P40, this Tesler dimmer switch offers a reliable and efficient solution for managing your lighting needs.