Nonmagnetic or bi-metallic relays. Controls operate from a supply of 105 volts to 130 volts, 50/60 cycles AC. Load ratings are 1000 watts for incandescent lamps and 1800V/A for mercury vapor, or fluorescent lamps. Unaffected by transient light. Interchangeable units conform to the EEI-NEMA standards. Incandescent, CFL (compact fluorescent), LED (light emitting diode), and halogen compatible. UL (Underwriter’s Laboratories) listed.