Using a SSC P4bin Led,no need for a fragile incandescenb bulb Maximum brightness:80Lumens One 1.5V AA(Alkaine,Ni-MH,Lithium) battery ,inexpensive amd widely available 2.5-hour working time(1hour 45 minutes peak brightness) 92MM(L)* 20MM(D) Constructed of aircraft grade aluminum Type III hard anodized finish,highly durable Waterproof Toughened ultra glass lens with AR coating Push-button tail cap switch Capable of standing up firmly on a flat surface to serve as a candle