... the surface needed, it start working.2. Free from maintainingWith light charging, it gives light in dark. ... power needed.Keep glowing even after being broken. With super stable characteristic of physics and chemistry, long ... luminance at a high level as 2741mcd/m2, with its light, newspaper is even readable in dark. ... marks, ground or wall,side or upper. With a suitable stick-to surface, it may be fixed ...