• 150 Watt: This indicates the power consumption of the fixture, providing a high level of brightness.
• LU: Stands for "Lamp Unit," indicating the type of light source used.
• S55: This refers to the model series, which suggests it belongs to the S55 product line.
• 4T: This specification typically denotes a four-tube fixture, referring to the configuration or number of lamps used.
• Kit 55116: This is likely a reference or catalog number for the complete kit, which may include all necessary components for installation or replacement.