Easy to install step-dim capability Reduces input power by 50% to meet energy codes - 50% control step;Dims all the lamps together providing equal burn hours on all lamps reducing uneven lifetimes as experienced with on-off switching systems - Adjustable light levels 100% power, 50% power, and off;Ensures ease of use and system compatibility across a broad range of applications - Operation from any line voltage switching device (such as standard toggle switches and occupancy sensors) Philips Advance Optanium ballasts with step-dim capability for T5 and T8 fluorescent lamps represent an affordable, energy-efficient, and versatile lighting solution designed to meet energy codes such as Californias Title 24 and ASHRAE 90.1-2010 that require end users to reduce lighting power consumption by 50%. Operating from any line voltage switching device, the ballasts programmed-start circuitry provides extended lamp life in frequent switching applications like those associated with the use of occupancy sensors or motion detectors making this product the sustainable choice for many commercial applications. Type CC;IntelliVolt multiple-voltage technology enables operation from 120 to 277V, 50/60 Hz;Lamp end-of-life protection circuit (T5) Conference rooms, private offices;Architectural cove;Educational facilities