Philips Lighting 236794 T8 Hig...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$44.25
Philips Lighting 236794 T8 High Output Fluorescent Lamp, 44-Watt, 4100K

Philips Lighting 236794 T8 High Output Fluorescent Lamp, 44-Watt, 4100K

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Model: 236794

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

$44.25
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Philips Lighting 236794 T8 High Output Fluorescent Lamp, 44-Watt, 4100K

The Philips Lighting 236794 F48T8/TL841/HO ALTO 25/1 is a 48-inch T8 high output fluorescent lamp built for commercial and industrial spaces that demand strong, consistent illumination. This 44-Watt lamp delivers 4000 lumens at a crisp 4100K color temperature with an 86 CRI, producing clean, accurate light for warehouses, retail environments, and high-bay fixtures. It uses an R17d recessed double contact base, making it a direct fit for standard high output T8 fixture sockets, and it is part of the Philips Alto® lamp family, engineered for efficient, long-lasting performance.

Key Features

  • Lamp Type: T8 High Output fluorescent lamp designed for commercial and industrial lighting fixtures.
  • Length: 48-Inch overall length for compatibility with standard 4-foot high output T8 fixtures.
  • Wattage: 44-Watt operation for efficient, high-output illumination.
  • Light Output: 4000-Lumens at 4100K color temperature for bright, consistent white light.
  • Color Rendering: 86 CRI for accurate, true-to-life color rendering in demanding work environments.
  • Base Type: R17d recessed double contact base for secure, reliable socket connection.
  • Alto® Technology: Part of the Philips Alto® lamp series, formulated for efficient light output over the lamp's rated life.

Technical Specifications

  • Lamp Type: T8 High Output Fluorescent
  • Wattage: 44-Watt
  • Base: R17d Recessed Double Contact
  • Lumens: 4000-Lumens
  • CRI: 86
  • Color Temperature: 4100K
  • Length: 48-Inch
  • Series: Alto®

Typical Applications

  • High-Bay Warehouse and Distribution Center Lighting
  • Retail and Commercial Interior Lighting
  • Industrial Facility and Manufacturing Floor Lighting
  • Gymnasiums and Large Open-Space Fixtures
  • Fixture Retrofits Requiring High Output T8 Lamps

Why Philips Lighting?

Philips Lighting's Alto® series is engineered to deliver dependable, high-output performance for demanding commercial and industrial spaces. With a 44-Watt high output design, 4000-Lumen output, 4100K color temperature, and 86 CRI, the 236794 lamp offers the bright, accurate light professionals rely on for large-format fixtures and high-bay applications.

Manufacturer Resources

Spec Sheet

Product Specs

list_batch:
PHIL-20260925
Product Type:
Fluorescent Tube
Product Wattage:
44W
Light Temperature:
4100K
Lumens:
4000
CRI:
86
Bulb Base:
R17d
Series:
Alto
Department:
Electrical
Product Subgroup:
Lamps & Bulbs
Product Group:
Lighting
Base:
R17D [ R17d (RDC)]
Color Code:
TL841 [ CCT of 4100K (841)]

Philips Lighting 236794 – Frequently Asked Questions

1) Is 4100K the right color temperature to match the other fluorescent tubes in my warehouse?
4100K is neutral cool white, the most common commercial and industrial fluorescent color. The 236794 carries the Philips 841 color code, meaning 86 CRI at 4100K. If your existing tubes are marked 841 or 741, this will match in appearance; if they are marked 835 or 3500K (warmer) or 850/5000K (cooler), you will see a visible difference between fixtures.
2) My fixture is 8 feet long, not 4. Is this the right lamp?
No. The 236794 is a 48-inch lamp, so it only suits 4-foot fixtures. For an 8-foot high output fixture, the Sylvania 22207 Octron 800 HO T8 is a 96-inch lamp and is the right length class.
3) What is the closest high output T8 alternative to the Philips 236794 if I need an 8-foot lamp instead of a 4-foot?
The Philips 236794 is a 48-inch T8 high output lamp rated 44 watts at 4100K with an R17d recessed double contact base. For an 8-foot high output run, the Sylvania 22207 Octron 800 HO T8 lamp is a 96-inch T8 HO lamp. Same T8 high output lamp family, but the 96-inch length is for 8-foot strip and high-bay fixtures, so it will not drop into the 4-foot sockets the 236794 serves.
4) Can I use a standard 32W T8 lamp in place of the Philips 236794?
Not interchangeably. The Philips 236794 is a 44-watt T8 high output lamp with an R17d recessed double contact base, which is the socket style used on high output fixtures. A standard linear T8 such as the Sylvania 22437, a 32-watt 3500K T8, is a different ballast and socket arrangement and a different color temperature from the 236794's 4100K. Confirm the fixture is wired for high output before swapping either way.
5) How much light does a 44W high output T8 lamp put out compared to a standard 32W T8?
The 236794 produces 4000 lumens at 44 watts. A standard 4-foot 32W T8 typically lands near 2800 to 3000 lumens, so the HO lamp gives you meaningfully more output per lamp, which is why it gets specified for high-bay warehouse, gym, and distribution center fixtures rather than office troffers.
6) What does the Philips code F48T8/TL841/HO ALTO mean on this lamp?
Reading it across: F48 is a 48-inch fluorescent, T8 is the one-inch tube diameter, TL841 is the Philips color code for 4100K at 86 CRI, HO means high output (44 watts on an R17d base), and ALTO is the Philips low-mercury lamp family. That full designation is what to give a distributor if you are matching lamps across a building.
7) What if my fixture takes a U-bend or T5 lamp instead of a straight 4-foot tube?
The 236794 is a straight 48-inch T8 and will not work in either. For a 2-foot U-tube troffer, the Sylvania 21878 FBO31/835 Octron Curvalume 31W U-tube is the correct shape. For a T5 high output fixture, the smaller-diameter Sylvania Pentron HO Ecologic T5 24-watt lamp is the matching type. T5 and T8 are not interchangeable in the same socket.
8) Which lamps match the 4100K color of the Philips 236794 for a facility standardizing on one color temperature?
The Philips 236794 runs 4100K, carried in its TL841 color code, with 86 CRI. Among the Sylvania linear and U-tube T8 options, the 22437 and the 21878 are both 3500K lamps, a visibly warmer white. If 4100K is your facility standard, stay on the 236794 for 4-foot high output positions rather than mixing in the 3500K tubes.
9) Is 86 CRI good enough for color-critical work like paint matching or retail display?
At 86 CRI the 236794 is in the standard high-CRI fluorescent range and is fine for retail merchandising, inspection benches, and manufacturing floors. For true color-critical work such as paint or print matching, buyers normally step up to a 90+ CRI lamp. Sylvania's Octron Vivid Value line is the enhanced-color family to look at there.
10) Where can I get the full photometric and electrical data sheet for the Philips 236794?
Philips publishes a spec sheet PDF for the 236794, linked in the product's specification data. It is the document to pull for submittal packages and for engineers checking ballast and photometric detail beyond the 44W / 4000 lumen / 4100K / 86 CRI headline figures.
How fast can I get the Philips Lighting 236794 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 236794 come with a warranty?
Absolutely. The Philips Lighting 236794 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 236794?
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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