Philips Lighting 423889 F40T12...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$14.53
Philips Lighting 423889 F40T12 High CRI Fluorescent Lamp, 4100K

Philips Lighting 423889 F40T12 High CRI Fluorescent Lamp, 4100K

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Model: 423889

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

$14.53
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Philips Lighting 423889 F40T12 High CRI Fluorescent Lamp, Alto® 4100K

The Philips Lighting 423889 F40T12 High CRI Fluorescent Lamp is a 48-Inch, 40-Watt T12 tube built on Philips' Alto® low-mercury platform for reliable, energy-conscious general lighting. This lamp delivers 2600 lumens of output at a crisp 4100K color temperature paired with an exceptional 89 CRI, making it well suited for applications where accurate color rendering matters alongside dependable, long-lasting illumination. Featuring a standard bi-pin G13 base, it is designed as a straightforward replacement for existing T12 fixtures in commercial, institutional, and industrial settings.

Key Features

  • Lamp Type: T12 fluorescent tube, 48-Inch length, for use in standard T12 fixture housings.
  • Wattage: 40-Watt rated consumption for efficient general-purpose lighting.
  • Light Output: 2600 lumens for consistent, bright illumination across large spaces.
  • High Color Rendering: 89 CRI delivers accurate, true-to-life color rendition, ideal for retail, display, and task-oriented environments.
  • Color Temperature: 4100K cool white output for clean, neutral illumination.
  • Base Type: G13 bi-pin base for compatibility with standard T12 sockets.
  • Alto® Technology: Part of Philips' Alto® lamp line, engineered to meet reduced-mercury environmental standards while maintaining reliable performance.

Technical Specifications

  • Wattage: 40-Watt
  • Base: G13 Bi-Pin
  • Lumens: 2600
  • CRI: 89
  • Color Temperature: 4100K
  • Length: 48-Inch
  • Lamp Family: Alto®

Typical Applications

  • Retail and Merchandise Display Lighting
  • Commercial Office and Institutional Fixtures
  • Industrial and Warehouse T12 Fixture Replacement
  • Color-Critical Task Lighting Environments
  • General Ambient Lighting in Existing T12 Fixtures

Why Philips Lighting?

Philips Lighting brings decades of lamp engineering expertise to the 423889 F40T12 Alto® series, combining a high 89 CRI rating with dependable 2600-lumen output and consistent 4100K color temperature. Built for straightforward drop-in replacement via its standard G13 bi-pin base, this fluorescent lamp gives facility managers and electrical professionals a trusted, efficient lighting solution for color-sensitive commercial and industrial spaces.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
PHIL-20260925
Product Type:
Fluorescent Tube
Product Wattage:
40W
Light Temperature:
4100K
CRI:
89
Bulb Base:
G13
Lumens:
2600
Department:
Electrical
Product Subgroup:
Lamps & Bulbs
Product Group:
Lighting
Base:
G13 [ Medium Bi-Pin Fluorescent]
Color Temperature:
4100 K
Product Weight:
0.569 lb
Product Height:
1.5 in
Country Of Origin:
United States
Product Length:
47.75 in
Product Color:
Cool White Supreme
Product Width:
1.5 in
Wattage:
40 W

Philips Lighting 423889 – Frequently Asked Questions

1) Will the Philips 423889 F40T12 lamp fit my existing 4-foot T12 fixture sockets?
Yes, as long as the fixture takes 4-foot T12 lamps on G13 medium bi-pin sockets. The 423889 is a 47.75 inch tube with a 1.5 inch diameter and a G13 bi-pin base, which is the standard end used on F40T12 lamps. It drops into existing T12 housings without any socket change.
2) Will a 4100K lamp match the tubes already in my building?
Only if the existing tubes are also 4100K. The 423889 is a 4100K cool white neutral output, sold as Cool White Supreme. If your other fixtures are running 3500K warm-neutral or 5000K daylight tubes, you will see an obvious color shift between fixtures. Check the code printed on an existing tube first, then standardize a whole room at a time rather than spot-replacing.
3) Can a Sylvania 22437 T8 lamp be used in place of a Philips 423889 F40T12 tube?
Not as a direct drop-in. The Philips 423889 is a 40-Watt, 48-Inch T12 tube with a G13 bi-pin base and 2600 lumens of output, intended for existing T12 fixture housings running T12 ballasts. The Sylvania 22437 is a 32-Watt T8 linear lamp at 3500K from the Octron Vivid Value Ecologic series. A T8 lamp of that type requires a T8-compatible ballast, so swapping it into a T12 fixture means changing or bypassing the ballast rather than just changing the lamp. If the fixture and ballast are staying as they are, stay with the T12 lamp.
4) My fixture takes an 8-foot lamp, not a 4-foot one. What should I order instead of the Philips 423889?
The Philips 423889 is a 48-Inch tube measuring 47.75 inches overall, so it will not fill an 8-foot strip fixture. For a 96-Inch socket spacing, the Sylvania 22207 Octron 800 HO is a 96-Inch linear fluorescent lamp. Confirm the ballast in the fixture suits the lamp type before ordering, since the 22207 is a T8 HO lamp and the 423889 is a T12.
5) The fixture uses a bent U-shaped tube with both pin ends at one side. Is the Philips 423889 the right lamp?
No. The Philips 423889 is a straight 48-Inch T12 tube with a G13 bi-pin base at each end. A fixture built for a bent lamp with both ends on the same side needs a U-tube, such as the Sylvania 21878 FBO31/835, a 31W 3500K T8 U-tube in the Octron Curvalume series. Check the leg spacing of the existing U-tube before ordering, and note the 21878 is a T8 lamp at 3500K rather than a 4100K T12.
6) Is 89 CRI worth it over a standard cool white F40T12 for retail display?
For color-critical work, yes. The 423889 renders at 89 CRI versus the 60s typical of standard halophosphate cool white tubes, so merchandise, paint, fabric and printed color read accurately under it. The tradeoff is light output: this lamp produces 2600 lumens at 40 watts, lower than a standard cool white F40T12, because high-CRI phosphor blends trade some lumens for color fidelity. In a display case, inspection area or paint-match bay that is the right trade. In a warehouse aisle where only foot-candles matter, it isn't.
7) What exact part number do I order for the Philips F40T12 89 CRI 4100K lamp?
Philips 423889. That is the manufacturer part number for the 40-watt, 48-inch F40T12 Alto lamp at 4100K with 89 CRI and 2600 lumens. It is made in the United States.
8) I need a U-bend or T5 lamp for my fixture, not a straight 4-foot tube. What else is there?
The 423889 is a straight 47.75 inch T12 tube and will not fit a U-bend or T5 socket layout. For a 2-foot U-tube troffer, the Sylvania 21878 FBO31/835 Octron Curvalume T8 U-tube is a 31-watt 3500K option. For T5 high output strips, the Sylvania Pentron HO Ecologic T5 24-watt lamp is the right family.
9) What is the difference in light color between the Philips 423889 and the Sylvania 22437?
The Philips 423889 runs 4100K with an 89 CRI, a cool white neutral output described as Cool White Supreme. The Sylvania 22437 is a 3500K lamp, a warmer neutral white. Mixing the two in the same room or the same fixture row will show a visible color difference, so if you are relamping only part of a space, match the color temperature of what is already installed.
10) Is the Sylvania Pentron HO T5 lamp an alternative to the Philips 423889 F40T12?
They serve different fixtures. The Philips 423889 is a 40-Watt T12 tube on a G13 medium bi-pin base, the standard socket in older T12 strip and troffer housings. The Sylvania 20928-2 is a 24-Watt T5 lamp from the Pentron HO Ecologic series; T5 lamps use a smaller-diameter tube and a different socket, so they belong in fixtures designed for them. Choose the T5 only if the fixture itself is a T5 fixture.
11) For color-critical retail display, does the Philips 423889 render color better than a standard Sylvania T8 lamp?
The Philips 423889 carries an 89 CRI with 2600 lumens at 4100K, which is why it is specified for retail, display, and task areas where accurate color rendition matters. Among the alternatives, the Sylvania 22437 is a 32-Watt 3500K T8 from the Octron Vivid Value Ecologic line and the Sylvania 21878 is a 31W 3500K T8 U-tube, both warmer in tone. If the goal is a neutral 4100K with high color rendering in an existing T12 fixture, the 423889 is the lamp that matches that requirement.
12) What does Alto mean on a Philips fluorescent tube, and does it affect disposal?
Alto is Philips' low-mercury lamp platform. The 423889 is built on it, meaning the tube is engineered to reduced-mercury environmental standards while holding normal performance. It still contains mercury and is still a fluorescent lamp, so handle spent tubes under your facility's lamp recycling program as you would any other fluorescent.
13) How much light will I lose per fixture if I switch to the 89 CRI F40T12?
Figure 2600 lumens per lamp. In a two-lamp troffer that is 5200 lumens before ballast factor and fixture efficiency; a four-lamp high bay gives 10,400. If your current tubes are standard 40-watt cool white rated nearer 3000 lumens, expect a visible drop in foot-candles, so run a light-level check in task areas before converting a whole floor to the high-CRI lamp.
How fast can I get the Philips Lighting 423889 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Philips Lighting 423889 come with a warranty?
Absolutely. The Philips Lighting 423889 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Philips Lighting 423889?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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