A Pennsylvania manufacturer with over thirty-five years in life safety lighting, covering LED, photoluminescent, hybrid and self-luminous exit signs, interior and exterior emergency luminaires, emergency lighting control devices and central inverters from 1.0 to 18.0 kVA. Products are designed to comply with UL 924, and the transfer devices additionally to UL 1008 — the pair of listings that decide whether normal light fittings can legitimately serve as the emergency source.