1. Model: E10, Voltage: 12V; LED color: 6000k, Cool white, Lumen: 150LM.Current: about 0.05A tested at 12V DC 2. Polarity: Negative ground (positive + at bulb tip), not suitable for positive ground system. 3. Function: Torch Light, Lighthouse Other Lanterns ect. Size: 31x11mm (LxD). 4.Easy to install: Replace the bulb by unscrewing the flashlight head from the body, removing the retainer collar and the old bulb, then inserting the new LED bulb.