This is a SYLVANIA Quicktronic electronic ballast for compact fluorescent lamps (CFLs). The model is 51823-QTP. It's designed to run two 18-watt twin-tube or quad-tube compact fluorescent bulbs (the kind with a 4-pin base, often labeled D/E or T/E). It's a universal voltage ballast, so it should work with common line voltages. It features \Prostart\ programmed rapid start technology, which is gentler on the lamp electrodes for longer bulb life. The ballast has a dual-entry design (wires come in on two sides) and is typically mounted using bolts. If you're replacing a ballast in an old CFL fixture and this part number matches, this is the correct OEM-quality component to get your lights working again.
