Identification & Application Philips 423889 F40T12/CW/SUPREME/ALTO 40W 4ft T12 Fluorescent Tube Cool White. The Philips 423889 is a 4 foot linear T12 fluorescent lamp designed for commercial, industrial, and residential fixtures using medium bi-pin lampholders. This 40 watt lamp provides cool white illumination for utility spaces, workshops, storage rooms, strip fixtures, wraparounds, and troffers requiring legacy T12 fluorescent operation. The lamp is manufactured in the ALTO low-mercury platform and SUPREME series configuration for maintained light quality in compatible ballast systems. A standard 48 inch tubular profile allows direct replacement of existing F40T12 lamps where ballast compatibility is confirmed. The cool white color appearance supports general task visibility and broad area lighting applications. The Philips 423889 F40T12/CW/SUPREME/ALTO 40W 4ft T12 Fluorescent Tube Cool White is designed for commercial, industrial, residential, maintenance, and specification-grade lighting applications requiring compatible installation conditions and documented manufacturer reference information. The product configuration supports use where the listed electrical, optical, mechanical, mounting, and control characteristics match fixture, replacement, and project requirements. Technical Performance Specifications Brand: Philips SKU/MPN: 423889 MPN: F40T12/CW/SUPREME/ALTO Product Type: T12 Fluorescent Tube Installation Type: G13 medium bi-pin lamp replacement for compatible fluorescent fixtures Electrical: 40W Optical: Cool White Base Type: G13 medium bi-pin Mechanical: T12 tubular shape, nominal 4 ft length, 1.5 in diameter Environmental: ALTO low mercury lamp construction, indoor dry location use Lifecycle: Long-life fluorescent lamp construction Documentation: See manufacturer spec sheet for additional details
