Up to 8 of the under-cabinet florescent lamps can be daisy-chained together with a pass through cable that comes included. To keep it cheap, I opted to use a single lamp. Position the unit in the center of the underside of the lid. I super-glued the light fixture to the lid, but you could use tape. Make sure you cut a small notch in the lid to allow the power cord to pass through without interfering with the lid closing.