Key Specifications/Special Features: 1. Working Voltage: 3.2V~9V/6-30V. Inserted a high-efficient constant current LED driver, which enable bulb to be used in wide-ranging voltage and keeping brightness. 2. LED power: 3 W 3. Long Lifespan: More than 50000 hours 4. High intensity: >150LM. The brightness of LED bulb is higher than incandescent bulb in the same power flashlight. 5. Lamp holder: Standard P13.5s or E10. 6. Input frequency: DC 7. LED: Cree / Made in China / Seoul / Rebel 8. LED Shape: Side-emitting 9. Light Angle: 180 degree 10. Environmental friendly, energy saving and shock-resistant Special Feature 1. The bulb has function of "TACP” (Temperature Auto Control Power). That means the output power of bulb’s driver will be controlled automatically according to different temperature, it will be enable bulb to fall temperature and working in the best. 2. The bulb has function of reverse polarity protection. That means when connect anode and cathode of power supply reversely, although the bulbs are not working, LED driver will not be damaged. Application: Flashlights, Lanterns, head lamps, patio lights, Closet lights, Emergency lights, Reading lights, bike lights