This LED bulb has build-in battery. It can be used as emergency light just by making current circuit such as taking the bulb head by thumb and middle finger and touch the bulb top by index finger.
(2) Features: Build-in recognize circuit, support emergency light for 3 hours. LED provides high light and saves more energy. Apply to home illumination and outdoor activity illumination. Portable, very convenient to carry.
(3) Specification: LED type: 24 * 5730 Luminous flux: 1100-1150LM (Normal mode), 580-650LM (Emergency mode) Color temperature: 6000K Power: 12W Input voltage: AC 85-265V Current: 3A Battery capacity: 1800MA Charging time: 1-2H Lighting time for emergency: 3H Material: ABS Item size: 9.4 * 14.5 cm / 3.7 * 5.7 in (D * H) Item weight: 121 g / 4.3 oz Package size: 15 * 10 * 10 cm / 5.9 * 3.9 * 3.9 in (L * W * H) Total weight: 165.0 g / 5.8oz