EASY TO INSTALL: This ba15d bulb supports using range AC/DC10V-18V, No need to distinguish positive and negative electrode of the bulb, directly insert it into the bulb sockets to finish installation. LONG LIFETIME: Made with Silica gel material, Has good waterproof function, fashionable looking, durable and excellent in heat radiation. safer than halogen bulbs, With a lifetime of up to 30000 hours, you can reduce the hassle of frequently replacing your light bulbs. Double Contact Bayonet: BA15D base is a Bayonet base with a diameter of 15mm (0.59in). The BA15d base has 2 contacts on the bottom and 2 parallel lugs on opposing sides of the base 180 degrees apart. (one +, one - on the bottom). Please note that it just has one brightness mode(Can’t be used as brake light). Low power consumption, Cool white 6000K, CRI ≧ 80Ra, super bright 500 lumens. can replace 35W conventional bulb/halogen lamp. Application: Can be used as Boat Light Bulb, Marine Light Bulb, Camper Travel Trailer LED Light Bulb, RV Interior LED Light Bulb, etc. Great for boat's Stern Light, patio deck lighting, closets, step wells, basement compartment lighting and reading lamp light. Features: 1. Made of silicone material, it has good waterproof function and is not dimmable. 2. Save up to 90% on electricity bills. It has a service life of up to 30,000 hours and is easy to install, lightweight and comfortable. 3. Wide range of applications: interior lighting, taillights, turn signals, corner lights, parking lights, side panels, spare bulbs, boats, lighting. Product specifications: Base: BA15D, power: 5W Color temperature: 6000K (cold white) Size: diameter 15 mm x L46 mm Input voltage: AC / DC 10V-18V Lumens: 500LM, CRI (Ra): > 80 Beam angle: 360 degrees Includes: 2x BA15D LED Bulb If you have any questions or concerns, please contact us.