Phillips PHIL409805 50W Hps Bulb Medium Base

Product Description

The PHILLIPS PHIL409805 is a 50-watt high pressure sodium (HPS) lamp in a medium base configuration. Cross-referenced as 40980-5 and lamp code C50S68/M, this bulb is designed for use in HPS-compatible fixtures requiring a standard medium screw base. At 50 watts, it fits smaller HPS luminaires used in accent, display, and low-level area lighting applications. Installation is performed by licensed electricians or qualified lighting technicians familiar with HID lamp systems. This lamp is noted as discontinued by the manufacturer, so procurement quantity should be considered carefully for maintenance and replacement planning purposes.

The C50S68/M designation places this lamp in the S68 bulb shape family at the 50-watt power class. It is suited for residential, light commercial, and specialty HID fixture applications where a compact medium base HPS source is specified. Facilities maintenance teams and electrical contractors typically encounter this lamp in older installed fixtures requiring like-for-like lamp replacement. Because it carries a non-Alto designation, it does not use the low-mercury Alto formulation, which may be a consideration for lamp disposal compliance in certain jurisdictions.

Key Features

• 50-watt HPS output in a compact S68 bulb envelope
• Medium screw base for compatibility with standard HPS medium base sockets
• Non-Alto formulation - standard mercury content, not low-mercury Alto variant
• Cross-reference codes 40980-5 and C50S68/M support legacy part lookup
• Discontinued SKU - suitable for like-for-like replacement of existing installations

Compatibility

Designed as a like-for-like replacement for HPS fixtures specifying the C50S68/M lamp type with a medium base socket. No additional compatible model numbers were provided in the product data.

Installation Notes

HPS lamps must be installed by a qualified electrician or lighting technician familiar with HID ballast systems. Always de-energize the fixture and allow the existing lamp to cool completely before handling, as HPS lamps operate at high surface temperatures. Verify that the replacement lamp wattage and base type match the fixture ballast rating before installation. Dispose of spent HPS lamps in accordance with applicable local regulations governing mercury-containing lamps.