An LEDs lifespan is measured by lumen depreciation because most LED light sources will decrease in light output over time rather than burning out like other technologies. Some LEDs can burn out but most just grow dim over time. The industry measures t
Cgg Newscree Q3 Waterproof Led Flashlight With 5 Led Light ModesThe LED flashlight is made from the CREE LED bulb. Durable, easily to use, convenient. Constant current / voltage circuit design, protect LED emitter from damage. CREE LED flashlight has circle and tail lamp waterproof apron with a luminous system. Aluminum alloy case, avoid damage when drop off on ground. Advanced Focus System, Soft touch to 5 different modes for using accordingly. Features: Focusing: Do not support. Light mode: 5 modes (Strong light, medium light, low light, slow flash, flash) Bulb Type: CREE Q3 External material: Durable Aluminum Water resistant: Yes Maximum range:300-350 meters Maximum luminous flux: 1,200 lumens Operating Temparature: -40 degrees to 40 degrees Battery: 2 x 18650 Continuous lighting time :1-3 hours Weight: 315g Length: 56x221mm User tip This flashlight is convenient and practical for your daily use Special needs. (For patrolling at night, best light in the power off period, hunting and arresting, inspecting, securing, Martin Rescue as well as Light Shooting and so on) Outdoor activities. (For exploring, climbing, camping, seeking survival, walking, diving, fishing as well as hunting, etc.) Professional needs (For Gems-Testing, Mineral-Testing, etc.) Good preparation for your family. Read this before order Please do not put it directly to people's eyes for the powerful light is harmful and it will make you blind temporarily, especially for the kid. The price of this flashlight dose not includes the battery and the charger. Strongly suggest you use the protected battery for it can really protect your battery well and extend your battery life as well as avoid the over-charging and over-discharging of your battery. For how to hanlde battery tha run out, please refer to your local RECYCLABLE* & NONRECYCLABLE MATERIALS policy to throw them to the appropriate trash accordingly. Please DO NOT throw it at anywhere and keep our plannt with a good enviroment. We are not responsible for the damage of the battery and charger due to not use according to user guide. Please never over-charger or over-discharge the 18650 batteries, which means when the brightness of the flashlight is going down clearly but not totally dark, it is the time to charger it, or the battery will be over-discharged and it will be broken or shortcircuit when you charge it the next time. What is included ? 1 X Cree Q3 waterproof LED flashlight with 5 LED light modes 1 X Charger Where to buy We recommend you buy it at coolgadgetsgift online store ...