OSRAM Sylvania QHE 4x54T5HO UNV PSN-HT-SCL Fluorescent Ballast

OSRAM Sylvania QHE4x54T5HO/UNV PSN-HT-SCL is a four-lamp electronic ballast designed for 54W T5HO fluorescent lamps, part of the QUICKTRONIC line and intended for reliable operation in commercial luminaires. It supports universal input voltage from 120 to 277V and is built in a Small Case Long (SCL) housing for a compact, long-formed ballast footprint that fits tight mounting spaces. The model is identified by part number 52665, and is the current designation that supersedes the older 51480 reference, configured for four F54T5HO lamps under UNV input. The PSN designation indicates Programmable Start operation, which aids dependable lamp ignition across compatible fixtures, while the four-lamp configuration provides balanced light distribution in multi-lamp arrangements. This ballast is specifically configured for 4x54T5HO setups in fixtures that require a compact, universal-voltage ballast with HT (high ambient temperature) capability, making retrofits and new installations using four high-output T5 lamps more straightforward and energy-efficient.