An LED light is much more energy efficient than a traditional plug-in lamp. Therefore, VOLKA Lighting Pty Ltd. offers waterproof bars that can be used in caravans, camping lights, or trailer interiors. The bar works on a 12V DC with up to 50,000 hours of life span and a 1 year warranty. Read their specifications at https://ledstore.volkalighting.com.au/2-x-50-cm-led-12v-light-bars-for-boat-caravan-camping-ready-kit-with-dc-to-battery-clips-alligator/