Application: In the past, all emergency lights were left on 24 hours a day to meet safety codes. Now you can specify & install a UL924 Listed Emergency Shunt Relay LUT-SHUNT-D, which converts up to 20A of normal light fixtures to approved emergency lights. During normal operation, the LUT-SHUNT-D dims designated emergency lights with the same control as your normal lights. During a utility power interruption, the LUT-SHUNT-D turns designated emergency lights on, at full brightness, regardless of dimmer position. The LUT-SHUNT-D can simultaneously bypass both a line voltage switch and a 0-10V dimming signal, ensuring that an emergency fixture illuminates at full brightness during a utility power interruption.