The ASP series was introduced to offer the option of fluorescent standby lighting for HID. The fluorescent ballast must also be Universal Voltage to work with the ASP-Auto. Operating specifications are similar to the ESP series controls. The ASP –Auto series is also a UL recognized component for US and Canada. The ASP series also operates Quartz Halogen lamps directly from 120 V, or 277 V when used in conjunction with a 277:120 V step-down transformer.