The TACO LUMA LED Marine T-Top Tube Light is impact-resistant, waterproof (non-submersion) , and tested to withstand use in marine and other outdoor environments. The TACO T-Top Tube Light makes it easy to upgrade to LED. The T-Top Tube Light is a great replacement light and will fit most standard fluorescent T-top light housings. With its sleek, finished appearance and included mounting clamps, this tube light can be used as-is or easily mounted to T-tops. Highly efficient, this LED T-top light offers a long 100,000-hour operating life with virtually no drain on standard 12V batteries. Switch from a bright 300-lumen white light to a low-glare 150-lumen red light thats ideal for chart reading. Its generous 18 long safe-shielded cable is great for use on tops, bridges, and towers of all sizes. The light measures 20"L x 39/64" dia.