JackonLux Rechargeable Emergency Light Bulbs UL Listed Battery Operated Light Bulb for Power Failure Camping Hurricane 5W 500 Lumens Soft White 5000K E26 120 Volt 2-PackColor:5000K | Size:2 Pack JackonLux battery backup light bulb is widely used in home, office, garage,warehouse, garden and outdoor activities, such as hiking, camping, etc. It is a perfect combination of regular led bulb and power outage lights. It works as regular led bulb when connected to 120V voltage, and it will light on automatically if there is power outage.SpecificationPower: 5WInput Voltage: 120 VoltAC Mode Lumens: 500 lm (40W Equivalent)DC Mode Lumens: 300 lm Light Color: Daylight 5000KEmergency Time: 3-4 hoursCharging Time: 6-8 hoursBase: E26How to use the rechargeable led bulb ?Insert the bulb into any suitable bulb fixture as regular led bulb, control on / off by switch. Screw the bulb into our plug cap, control on / off by switch on our cap.Use fingers touch bulb base, control on / off by fingers.Use JackonLux patent plug cap on fixture plug. How Does The Bulb Work During Power Outage ? When there is a power outage, switch on and plug in, the bulb will stay on as emergency led light, if witch off, the bulb will be off. Why The Bulb Is Always On ? Can Not Turn Off ? Normally this will not happen, but if your lamp circuit system is very complex and special, this will happen, all different brands of emergency light bulbs in current market has this same problem, this is decided by working principle. We offer warranty for all our light bulbs, we can offer fully refund if you are not satisfied with our bulbs How To Test Emergency Mode At Home If No Power Outage ?Way 1: screw our emergency led light into any E26 fixture and plug in, switch on the bulb, cut off main breaker, the bulb will stay on, switch off, it will be off. Way 2: insert plug prongs into JackonLux plug cap, switch on, the bulb light on.