The Rack Light Kit (flourescent) is mounted under the roof of the rack and is used to illuminate the rear section of the rack. The light is turned on and off with the opening and closing of the rear doors. This HP product contains the following materials that might require special handling at end-of-life: - Mercury in the fluorescent lamp in the display LCD. Disposal of mercury can be regulated because of environmental considerations. For disposal or recycling information, please contact your local authorities or the Electronic Industries Alliance (EIA)