Home » Gadgets » Luminous Backpack Gadgets Luminous Backpack February 4, 2020 The LED luminous backpack glows in 7 colors – Red, Green, Blue, White, Light Blue, Purple & Gold; And 4 Light Mode – Monochrome, Flash, Strobe & Fade, Smooth. Made from high-quality fiber optic fabric, soft and comfortable, no heat, no radiation, harmless to the human body. And it comes with adjustable shoulder straps, unisex style, one size fits for most of adult and kids.USB charging for 2 hours will keep the light working for 4-6 hours. (Working period differs by different light up mode).