Gelight appears to be a brand/model line of marine lighting products (especially lamps/bulbs) designed for use on boats and marine environments. These include projector lamps and sealed beam lamps suited for marine electrical systems. These lamps are typically used for deck, cabin, anchor, or spotlight illumination on boats, and they match voltages such as 12 V/13 V/21 V/32 V commo... https://www.stevestonmarine.com/collections/vendors?q=Gelight