Philips Lighting 458257 PL-T T...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$22.61
Philips Lighting 458257 PL-T Triple U-Tube CFL Lamp, 26W, 4-Pin, 3000K

Philips Lighting 458257 PL-T Triple U-Tube CFL Lamp, 26W, 4-Pin, 3000K

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Model: 458257

In Stock (leaves warehouse same day if ordered before 3pm ET)

$22.61
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Philips Lighting 458257 PL-T Triple U-Tube CFL Lamp, 26W, 4-Pin, 3000K

The Philips Lighting 458257 PL-T is a dimmable triple U-tube linear compact fluorescent lamp built for reliable performance in commercial and light-industrial fixtures. Rated at 26-Watt and equipped with a 4-Pin GX24q-3 base, this Alto® lamp delivers 1750 lumens at a warm 3000K color temperature with an 83 CRI, giving accurate color rendering for offices, retail spaces, and general-purpose lighting applications. As a true dimmable CFL, it integrates into fixtures with compatible dimming ballasts, allowing facility managers and electrical contractors to fine-tune light output for energy savings and occupant comfort without sacrificing lumen quality.

Key Features

  • Lamp Type: Triple U-tube linear compact fluorescent (PL-T) construction for compact, high-output illumination in standard PL-T fixtures.
  • Wattage: 26-Watt rated consumption delivers efficient light output while keeping energy costs in check.
  • Base Configuration: 4-Pin GX24q-3 base ensures proper fit and secure connection in compatible dimming and non-dimming fixtures designed for this base style.
  • Light Output: 1750 lumens provides strong, consistent illumination suitable for task and ambient lighting needs.
  • Color Temperature: 3000K produces a warm white light, well suited to spaces where a comfortable, inviting color appearance is desired.
  • Color Rendering: 83 CRI supports accurate, true-to-life color rendering for general commercial environments.
  • Dimmable Performance: Designed for use with compatible dimming ballasts, allowing adjustable light levels to match occupancy and daylighting strategies.
  • Alto® Technology: Part of the Philips Alto® lamp family, engineered for efficient operation in fluorescent lighting systems.

Technical Specifications

  • Lamp Family: PL-T 26W/830/A/4P/ALTO
  • Wattage: 26-Watt
  • Base: 4-Pin GX24q-3
  • Lumens: 1750
  • CRI: 83
  • Color Temperature: 3000K
  • Dimmable: Yes
  • Configuration: Triple U-Tube Linear Compact Fluorescent

Typical Applications

  • Commercial Office Lighting
  • Retail and Display Lighting
  • Hospitality and Common-Area Fixtures
  • Fixture Retrofits Requiring 4-Pin GX24q-3 Base Lamps
  • Dimmable Fluorescent Lighting Systems

Why Philips Lighting?

Philips Lighting is a trusted name in commercial and industrial lighting, and the 458257 PL-T Alto® lamp continues that standard with dependable 26-Watt output, a warm 3000K color temperature, and 83 CRI color accuracy in a familiar 4-Pin GX24q-3 base. Its dimmable design gives electrical contractors and facility managers added flexibility for energy management, while the Alto® platform reflects Philips' commitment to consistent, efficient fluorescent lighting performance for professional installations.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
PHIL-20260925
Product Type:
Compact Fluorescent Lamp
Product Wattage:
26W
Light Temperature:
3000K
Bulb Base:
GX24q-3
Lumens:
1750
CRI:
83
Dimmable:
Yes
Configuration:
Triple U-Tube Linear Compact Fluorescent
Department:
Electrical
Product Subgroup:
Lamps & Bulbs
Product Group:
Lighting
Color Designation:
Warm White (WW)
Color Code:
830 [ CCT of 3000K]
Base:
GX24Q-3 [ GX24q-3]

Philips Lighting 458257 – Frequently Asked Questions

1) Will the Philips 458257 fit a fixture that takes a 2-pin PL-T lamp?
No. The 458257 is a 4-pin GX24q-3 lamp, which runs on an electronic ballast circuit. Two-pin lamps have an integral starter and use a magnetic preheat ballast, so the two are not interchangeable even when the tube shape looks the same. You need a fixture wired for a 4-pin GX24q base.
2) Is the GX24q-3 base the same as GX24q-2 or GX24q-4? Can I use a 26W PL-T in a 32W socket?
They are not the same. The GX24q keying changes with wattage: the 458257 carries a GX24q-3 base, which is the 26W keying. A 32W PL-T uses GX24q-3 as well in some ranges, but 18W (q-2) and 42W (q-4) are keyed differently and will not seat. Match the socket keying and the ballast wattage, not just the pin count.
3) Do I need a dimming ballast to dim this Philips PL-T lamp?
Yes. The 26W 458257 is a dimmable CFL, but the dimming happens at the ballast. Put it in a fixture with a 4-pin dimming ballast rated for 26W PL-T and you can trim output; drop it into a standard non-dimming electronic ballast and it simply runs at full light. A wall dimmer alone, with no dimming ballast, will not work.
4) Will a 3000K lamp match the other lamps already in my building?
Only if the existing lamps are 830 or 3000K. The 458257 is a warm white lamp at 3000K with color code 830 and 83 CRI. If your other fixtures are running 835 (3500K) or 841 (4100K), the difference is visible side by side in the same room or corridor. Property managers relamping a floor should check the color code printed on the old tube and keep the whole space on one number.
5) I need a 3000K 4-pin CFL but my fixture takes a double twin-tube lamp, not a triple. What should I order?
The Philips 458257 is a triple U-tube linear compact fluorescent and will not seat in a fixture built for a double twin-tube lamp. For a 4-pin lamp at the same 3000K warm white color, the Sylvania 20721 Dulux D/E Ecologic is a 4-pin compact fluorescent at 3000K, and the Dulux D/E double twin-tube geometry is what double-tube sockets are cut for. Confirm the socket's pin code matches the Sylvania lamp's base before ordering.
6) What is the difference between a triple U-tube PL-T and a twin-tube or double PL lamp?
Triple U-tube means three bent tubes bundled on one base, so you get more arc length in a shorter overall lamp. That is why the 458257 fits compact downlight cans where a long twin-tube will not. A twin-tube lamp like the Sylvania 20586 Dulux L is a long, flat two-leg lamp meant for linear wall-mount and cove fixtures. A double lamp such as the Sylvania Dulux Double Ecologic sits between them. The shapes are not interchangeable inside a given fixture housing even when base keying matches.
7) What is the exact part number to order this Philips PL-T lamp?
Order Philips 458257. The lamp designation printed on it is PL-T 26W/830/A/4P/ALTO, which decodes as a 26W triple-tube, 830 color (3000K), amalgam, 4-pin, Alto low-mercury construction. Giving a distributor either the 458257 number or that full designation gets you the same lamp.
8) We standardize on warm white in guest corridors. Which of these lamps hold 3000K?
Two options carry the 3000K warm white color point: the Philips 458257 PL-T, a 26-Watt triple U-tube lamp on a GX24q-3 4-pin base rated 1750 lumens at 83 CRI, and the Sylvania 20721 Dulux D/E Ecologic 4-pin lamp at 3000K. The Sylvania 20877 Dulux T/E/IN runs 3500K and the Sylvania 20586 Dulux L runs 4100K, so neither will visually match a 3000K corridor. Choose between the Philips triple U-tube and the Sylvania D/E based on which tube geometry the existing fixtures accept.
9) Which of these CFLs can I put on a dimming ballast?
The Philips 458257 PL-T is specified as dimmable and is intended for fixtures with compatible dimming ballasts, so it is the one to use where light levels are tuned for occupancy or daylight harvesting. The Sylvania Dulux comparables, including the Dulux D/E Ecologic and Dulux Double Ecologic lamps, are identified by series and tube style rather than by a dimming rating, so verify the ballast pairing for those separately against the lamp's own data before committing them to a dimming circuit.
10) How much light does a 26W PL-T triple U-tube put out?
1750 lumens from 26 watts. That is the normal output band for a triple-tube 26W CFL and it suits downlights, wall sconces, and recessed cans in offices, retail, and hotel common areas. For a task area needing more punch on the same footprint you would step up to a higher wattage PL-T rather than add fixtures.
11) Is 83 CRI good enough for retail display or does it need to be higher?
At 83 CRI the 458257 handles general commercial work, offices, corridors, hospitality common areas, and most retail shelving, where colors need to read correctly but not be judged critically. For color-critical merchandising such as apparel, cosmetics, or paint sales, buyers typically specify a 90-plus CRI source instead.
12) What is the difference between the Philips 458257 and the Sylvania Dulux Double Ecologic lamp?
The difference is tube geometry. The Sylvania Dulux Double Ecologic is a double-tube compact fluorescent lamp, while the Philips 458257 PL-T is a triple U-tube linear compact fluorescent on a GX24q-3 4-pin base, rated 26-Watt at 3000K with 1750 lumens and 83 CRI. A triple U-tube lamp is physically shorter for its output than a double-tube lamp of comparable wattage, which is why PL-T fixtures are specified for tighter downlight cans. The socket and pin arrangement must match the lamp, so the two are not drop-in alternates for each other.
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Does the Philips Lighting 458257 come with a warranty?
Absolutely. The Philips Lighting 458257 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
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