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LEGACY REFERENCE

Philips PL-T 18W/827

Identification

GX24q-2
Wattage18W
Pins4
Color code827
Color temp2700K
Initial lumens1,200
Order code458190

DETAILED REFERENCE

How to identify and replace Philips PL-T 18W/827

This page documents the Philips PL-T 18W/827, a 18W PL-T lamp using a 4-pin GX24q-2 base. The catalog record identifies color code 827 (2,700 K in this catalog record) and 1,200 initial lumens. Manufacturer order code 458190 provides another high-value identifier when it is present on the lamp or packaging.

For a replacement decision, use the complete combination of markings rather than one feature. A lamp with the same base can still differ in wattage, keying, color, pin configuration, ballast requirements, or other electrical characteristics.

MANUFACTURER FAMILY NOTES

Philips PL-T 4-pin family guidance

These are family-level notes from the manufacturer source. They add operating context for PL-T 18W/827, but they do not turn another lamp in the same family into an automatic substitute.

  • The PL-T triple-tube 4-pin family uses keyed GX24q bases across multiple wattage classes; the suffix remains part of the compatibility key.
  • Signify lists the 4-pin family as dimmable and positions it for downlights in offices, hotels and retail environments.
  • Family documentation covers 18W, 26W, 32W, 42W and 57W classes, so matching the wattage/base combination is essential even when two lamps look similar.

Manufacturer source: Signify — Philips PL-T Triple 4-Pin Base

Identification checklist

  1. Read the full lamp marking.Look for PL-T 18W/827 and order code 458190 rather than relying only on the shape.
  2. Confirm the base and pins.This record uses 4-pin GX24q-2. A similar-looking keyed base or a different pin count should be treated as a different lamp until verified.
  3. Match wattage and color identity.Reference values here are 18W and color code 827. Color codes that look similar can identify different variants.
  4. Check the fixture electronics.Verify ballast/control gear, supply voltage, socket keying, and manufacturer instructions before installing a fluorescent substitute or LED retrofit.

Search names and aliases

Older lamps are often listed under shortened model strings, base-first descriptions, or manufacturer order codes. These are the aliases currently indexed for this record.

CFTR18W/GX24q/827PL-T 18W 82718W GX24q-2GX24q-2 18W45819-0458190

Before buying a replacement

  • Match the exact GX24q-2 base and 4-pin configuration.
  • Confirm the original 18W rating and the fixture's approved lamp range.
  • Match color code 827 when maintaining the same light color is important.
  • Use order code 458190 as a strong cross-check when a seller provides it.
  • For LED conversions, confirm whether the replacement is ballast-compatible, ballast-bypass, or otherwise requires a specific wiring method.

The Replacement Index separates reference specifications from retailer listings. A product appearing for sale does not by itself establish compatibility.

Frequently asked questions

Is GX24q-2 enough to identify a replacement?

No. Match the complete lamp identity, including base, pins, wattage, color information, and the fixture's electrical requirements.

Can I replace PL-T 18W/827 with LED?

Possibly, but only with an LED product designed for the exact socket and electrical configuration. Some retrofits use a compatible ballast and others require different wiring.

What should I compare first?

Start with manufacturer order code 458190 when it is visible, then confirm the full model, base, wattage, pins, and color code.

Source provenance

The specifications above come from the source records attached to this catalog entry. Retail marketplace data is maintained separately.

  • Philips Lighting / SignifyPhilips Product Guide 2019 — Compact Fluorescent Lamps · supports historical specifications · accessed 2026-09-09
  • Signify / PhilipsPhilips PL-T Triple 4-Pin Base · supports series guidance · accessed 2026-09-09