1154 6 Volt non polarity BAY15D. The Lumen output for brake light is up to 220 Lumens. The Lumen output for taillight is up to 150 Lumens. The approximate is 0.740" diameter and 1.023" length. The bulb is dimmable. The max voltage is 7.5 volts. The minimum required voltage is 5 volts. Long life up to 30,000 hours. Uses up to 90% less energy than a incandescent bulb. Comparable to a 15 Watt to 25 Watt incandescent bulb. CE and Rohs. Available in red, green, blue, yellow, white 6000K and warm white 3000K. The white 6000K is about 5% brighter than the warm white. The diameter of the base is 15mm. The bayonets are offset. There are two contacts on the bottom. CE and Rohs.