Self-luminous signs, however, are always on if there is power or not. They must automatically come on the second a loss in power is detected. UL Emergency RuntimeĪll exit signs must maintain illumination for a minimum of 90 minutes following a power outage. These guidelines include the legal lettering size, color, viewing distance and emergency runtime required of all emergency fixtures. Though SL fixtures have a self-contained lighting source that requires no electricity, they still fall under UL 924 guidelines. These standards are independent of state and city codes, which you should also familiarize yourself when installing your self powered exit sign. UL 924 is a nationally recognized exit sign standard in the United States and Canada. Such life-saving equipment must automatically illuminate or power critical areas and equipment during a major power outage. UL 924 covers all emergency lighting that uses 600 volts or less. UL has standards for over 1000 different classifications of safety and electronic devices. See Our Single Sided Self Luminous Exit Signs Their proven brand is one of the most trusted qualifiers for all self luminous exit signs. The Underwriters Laboratories (UL) is an internationally recognized non-profit organization that has been certifying public safety appliances for over a century.
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