Ever-Brite® photoluminescent signs are the intrinsically safe, zero energy, environmentally friendly solution for marking your emergency evacuation routes. Engineered with photoluminescent material that absorbs and stores fluorescent, metal halide or mercury vapor light, Ever-Brite® signs create clear, brightly glowing egress pathways during emergency blackout or smoky conditions. The 21.6 lx signs can also be charged with LED light so you are never left in the dark.