The Aimlite EXTBM-SXTBM series of self-luminous exit signs provide reliable exit signage for applications where typical signs cannot be employed. The EXTBM-SXTBM series are completely non-electrical so they can be installed in any location, including glass entranceways/vestibules, greenhouses and outdoor applications. This also insures that the EXTBM-SXTBM signs are non-sparking, making them ideal for explosion-proof locations. Available with a 10, or 20 year for EXTBM and 12 year for SXTBM expected life, sealed tritium-phosphor light source are available in wall or ceiling mount (canopy included).