Universal kit adapters included to replace 821, 1411 and 1036. Last 30 times longer then standard Bulb. 30, 000 hour life expectancy. Replaces 516, 579, 904, 906, 912, 916, 917, 918, 920, 921, 922, 923, 1003, 1036, 1073, 1093, 1129, 1141, 1156, 1159, 1295, 1459, 1619, 1651, 1680, 3423, 3425, 3497, 5007, 5008, 7506 and 7527.
