Each 921 LED light bulb with T10 wedge base delivers 2700K-3000K soft warm white and super bright 420 lumens at energy saving 1.5 watts. Frosted lens with 3 pcs SMD-2835 mounted inside softens the light output smoothly and distribute beam more evenly without any dark spots. Because of polarity sensitive, if LED bulb doesn't light up, please flip plug and try again.Each LED kit contains 8 pieces 921 LED bulbs featuring low voltage 12V, low power consumption dedicating to save electricity bill, and aluminum base for producing less heat than halogen. This LED light bulb is not same size as 194 or 921 halogen bulb, please make sure the bulb dimension fits your application. If your lighting fixtures are equipped with dimmer switch, these non-dimmable 921 LED bulbs won't work.Commonly used for car, RV camper, travel trailer, motorhome, 5th wheel, marine boat, pontoon, vessel, barge, ship, sail boat, yacht, van, caravan, truck, and also used for outdoor Malibu landscape lighting, such as garden light, patio light, yard light, spotlight, ground light, paver light, deck stair step light, fence area light, pathway light, driveway light, walkway light, lawn path light, cast metal tier light.Direct replacement for all T5 T10 T15 miniature wedge base: W5W, W10W, 124, 147, 152, 158, 159, 160, 161, 168, 175, 184, 192, 193, 194, C194, 195, 259, 280, 285, 447, 464, 501, 555, 558, 579, 585, 655, 656, 657, 658, 1250, 1251, 1252, 2450, 2652, 2821, 2825, 2825L, 2827, 2921, 3652, W16W, T15, 579, 901, 902, 904, 906, 908, 909, 912, 914, 915, 916, 916LL, 916NA, 917, 918, 920, 921, C921, 921K, 922, 923, 926, 927, 928, 939Application: car backup reverse light; Truck map light; RV camper interior indoor light, ceiling dome downlight, desk reading light, closet light, counter spotlight, under cabinet puck light; Marine boat navigation bow and stern light, courtesy light. Specification LED Chips: 3 pieces 2835-SMD Beam Angle: 360 Degree Brightness: 420lms/bulb Output Wattage: 1.5W/bulb Working Voltage: 12V Color Temperature: 2700K-3000K soft warm white Life Span: Up to 30,000 hours Warranty: One year guaranteed on manufacturer quality Base: T10 wedge base Application: RV camper light, motorhome light, marine light, boat Light, interior ceiling dome light, under cabinet light, puck light, closet light, counter light, outdoor garden light, patio light, yard light, Malibu landscape light, deck light, stair step light, post pathway light Package Included: 8 x 921 LED bulbs