The Revolution 921-280 is a very bright omni-directional bulb, perfect for sconces and chandelier lighting fixtures. Produces 280LMS, and a natural light at 3100k. It lasts 100 times longer than the incandescent it replaces, and is 450% more energy efficient. 12 volt DC, total watts 2.4 and life span of 60,000 hour life expectancy. Bulb base W2.1 x 9.5d wedge base. Comparable to bulbs: 194, 516, 579, 901, 904, 906, 912, 915, 916, 917, 918, 920, 921, 922, 923.