Division 1 flashlight is the highest grade of hazardous locations classifications for explosion proof flashlight and hazardous locations flashlight. Division 1 are divided into class 1 division 1 whose application scope is ignitable gas or vapor and class 2 division 1 whose application range is ignitable dust. In most case, when we talk about division 1 flashlight, it is defaulted for ignitable gas or vapor, such as acetylene, hydrogen, ethylene and propane.