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LEGACY REFERENCE

Philips PL-L 18W/841

Identification

2G11
Wattage18W
Pins4
Color code841
Color temp4100K
Initial lumens1,250
Order code345017

DETAILED REFERENCE

How to identify and replace Philips PL-L 18W/841

This page documents the Philips PL-L 18W/841, a 18W PL-L lamp using a 4-pin 2G11 base. The catalog record identifies color code 841 (4,100 K in this catalog record) and 1,250 initial lumens. Manufacturer order code 345017 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-L 4-pin family guidance

These are family-level notes from the manufacturer source. They add operating context for PL-L 18W/841, but they do not turn another lamp in the same family into an automatic substitute.

  • PL-L uses the inline four-pin 2G11 base across several lamp lengths and wattages, so the shared base does not make the wattage classes interchangeable.
  • Signify family documentation lists use with Rapid Start, electronic and dimming circuits, and Instant Start for specified 40W variants.
  • Because the control-gear options vary by lamp/fixture, verify the ballast or driver requirements before choosing a fluorescent replacement or LED conversion.

Manufacturer source: Signify — Philips PL-L Long 4-Pin Base

Identification checklist

  1. Read the full lamp marking.Look for PL-L 18W/841 and order code 345017 rather than relying only on the shape.
  2. Confirm the base and pins.This record uses 4-pin 2G11. 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 841. 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.

FT18W/2G11/841PL-L 18W 84118W 2G112G11 18W34501-7345017

Before buying a replacement

  • Match the exact 2G11 base and 4-pin configuration.
  • Confirm the original 18W rating and the fixture's approved lamp range.
  • Match color code 841 when maintaining the same light color is important.
  • Use order code 345017 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 2G11 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-L 18W/841 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 345017 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-L Long 4-Pin Base · supports series guidance · accessed 2026-09-09