LU150/MED is the standard industry part number for a 150-Watt High Pressure Sodium (HPS) HID light bulb. It features an E26 medium screw base, utilizes an ED17 or B17 outer glass bulb shape, and requires an ANSI S55 ballast to operate safely. These bulbs are heavily utilized for commercial outdoor security, parking lot, and roadway applications due to their exceptional 24,000-hour life span and intense 15,000 to 16,000-lumen output.