1158 LED Bulb BA15D Base 8 Volt 2.6 Watt G18. Dual filament both tail light and brake light. Up to 320 Lumens for brake light and 240 Lumens for taillight. Long life up to 30,000 hours. Works either positive ground or negative ground. The base has even bayonets. There are two contacts. The diameter is 15mm. Dim-able with variable voltage supply. Available in White 6000K, Warm White 3000K, Green, Blue, Red and Yellow. 8 Volts is designed for 8 Volt Fords. CE and Rohs.