Philips 384503 PL-T 42W/27/4P/ALTO 14900

Philips 384503 PL-T 42W/827/4P/ALTO – 42W Triple-Tube CFL | 3,200 lm | 2700K | 82 CRI | GX24q-4 4-Pin | ALTO | 16,000 Hours

The Philips 384503 (PL-T 42W/827/4P/ALTO) is a 42W triple-tube compact fluorescent lamp with amalgam technology on a GX24q-4 4-pin base, delivering 3,200 initial lumens at 2700K (Warm White / Incandescent White) with 82 CRI. This is an ALTO® low-mercury lamp (1.4 mg Hg) that passes EPA TCLP testing for non-hazardous waste classification. It requires a compatible electronic ballast — it is not a screw-base lamp. Dimmable with electronic dimming ballasts. Rated for 16,000 hours average life. Please verify base type, ballast compatibility, and socket configuration before ordering.

Technical Specifications

Product Overview

The Philips 384503 is a 42W PL-T triple-tube plug-in compact fluorescent lamp with amalgam technology, designed for commercial downlights and medium-bay multi-lamp fixtures. At 3,200 initial lumens from 42W at 2700K with 82 CRI, it provides warm, color-accurate light well-suited to office, retail, hospitality, and institutional environments where a warm incandescent-like color temperature is preferred.

The amalgam technology is a key feature: unlike standard CFL lamps that suffer significant lumen loss in cold or enclosed-fixture environments, the amalgam design maintains greater than 90% of rated lumens across a wide ambient temperature range (23°F to 130°F), making the lamp reliable in both cold-start outdoor covered applications and hot enclosed downlight trims where heat buildup reduces output in standard CFLs.

The ALTO® designation indicates reduced mercury content (1.4 mg nominal), enabling the lamp to pass EPA TCLP testing for non-hazardous waste classification — simplifying disposal in commercial facilities subject to hazardous waste tracking requirements. The GX24q-4 4-pin base operates exclusively on compatible electronic ballasts designed for 42W triple-tube CFLs. Rated average life is 16,000 hours at a minimum 3-hour start cycle.

Compatible Applications

• Commercial recessed downlights with GX24q-4 4-pin electronic ballast sockets
• Medium-bay multi-lamp fixtures for general lighting
• Office and retail ambient and task lighting
• Hospitality and institutional corridor and room lighting
• Enclosed and covered fixtures where amalgam technology prevents cold/hot lumen loss

Before Ordering – Verify

• Base and pin count: GX24q-4 (4-pin, 42W class). This base will not physically fit a GX24q-3 (26W) or GX24q-2 (18W) socket; confirm the socket pin count and wattage designation before ordering.
• Ballast required: This lamp requires a compatible electronic ballast rated for 42W GX24q-4 triple-tube CFLs. It does not operate without a ballast and is not self-ballasted.
• Dimming: Dimmable only with electronic dimming ballasts specifically designed for CFL dimming. Standard electronic ballasts do not support dimming.
• CCT options: The PL-T 42W/4P family is available in 2700K (827), 3000K (830), 3500K (835), and 4100K (841). Confirm the correct CCT before ordering; this lamp is 2700K (Warm White / Incandescent White).
• Wattage options: The PL-T triple-tube 4-pin family is available in 18W, 26W, 32W, and 42W. Each wattage uses a different GX24q base variant (q-1/q-2/q-3/q-4); confirm both wattage and base before ordering.
• Rated life note: The Philips product data table specifies 16,000 hours average life for this product (384503). The PL-T family brochure marketing copy states 12,000 hours as a general family figure. We have used the product-specific figure (16,000 hours) as ground truth.

Safety and Handling Guidelines

• This lamp contains mercury (1.4 mg, ALTO® reduced). If broken, ventilate the area and follow EPA fluorescent lamp breakage cleanup guidelines; do not vacuum broken pieces
• Although ALTO® TCLP-compliant, recycle through a designated lamp recycling program per applicable regulations; check local requirements before disposing in general waste streams
• Disconnect power before installing or replacing the lamp
• Handle by the base; avoid contact with the glass tubes

Compliance

• ALTO® — passes EPA TCLP for non-hazardous waste classification (1.4 mg Hg)
• Contains mercury — subject to state and federal fluorescent lamp disposal regulations even at ALTO levels; check local requirements
• Energy Efficiency Label: B
• 4-pin GX24q-4 base for electronic ballast use only

Ordering Information

• Product Number: 384503
• Ordering Code: PL-T 42W/827/4P/ALTO
• UPC: 046677384500
• Case Quantity: 12 per case
• CCT siblings: 830 (3000K), 835 (3500K), 841 (4100K) — confirm product number for each CCT
• Reported cross-references (unverified — confirm before substitution): GE F42TBX/827/A/ECO; Sylvania CF42DT/E/IN/827/ECO

For wholesale pricing, bulk availability, or help confirming the correct replacement lamp, contact ADL Supply at 1-800-235-3489.