Panasonic Fluorescent Lighting Fixture Ceiling Light Fluorescent Lamp HHFZ4322 Auto Eco Dimming Twin pa The brightness sensor detects the brightness of the room and automatically adjusts the dimming. Even if it's on all day from morning, you can save energy without realizing it. * The fluorescent light has burned out, so we are replacing the light fixture at this opportunity. The fluorescent light cannot be used, so it will be shipped without it. Please comment if you need it. Please check the photos and purchase as this is a used item. Type: Ceiling Light Light Source Type: Fluorescent Lamp