Sylvania Octron U-Tube T8 Fluo...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$17.27
Sylvania Octron U-Tube T8 Fluorescent Lamp, 32W

Sylvania Octron U-Tube T8 Fluorescent Lamp, 32W

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Model: 21670

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

$17.27
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Sylvania 21670 Octron U-Tube T8 Fluorescent Lamp, 32W 3500K

The Sylvania 21670 (FBO32/835/6/ECO) is a 32-Watt T8 U-tube fluorescent lamp built on Sylvania's Octron 800 Curvalume platform with Ecologic construction. This U-bent lamp features a 2-Pin medium base, a 22-1/2-Inch length, and delivers 2850 lumens at a warm-neutral 3500K color temperature with an 82 CRI for accurate color rendering. It is designed as a direct, energy-efficient replacement for U-tube fluorescent fixtures found in commercial and industrial ceiling troffers where a compact bent-lamp footprint is required.

Key Features

  • U-Bent Form Factor: 22-1/2-Inch length U-tube design for compact 2x2 troffer and fixture applications where straight linear tubes will not fit.
  • Wattage: 32-Watt T8 lamp delivers efficient light output while consuming less energy than legacy T12 U-tube lamps.
  • Light Output: Rated at 2850 lumens for consistent, bright illumination across commercial ceiling installations.
  • Color Temperature: 3500K color temperature produces a neutral white light suited to offices, retail, and general commercial spaces.
  • Color Rendering: 82 CRI provides accurate, natural-looking color rendition for task and ambient lighting.
  • Base Type: 2-Pin Medium Base connection compatible with standard U-tube fluorescent sockets and fixtures.
  • Octron 800 Curvalume Technology: Sylvania's Octron 800 Curvalume platform is engineered for consistent lumen maintenance and long service life in U-bent lamp form factors.
  • Ecologic Construction: Ecologic design supports reduced environmental impact compared to standard fluorescent lamp construction.

Technical Specifications

  • Lamp Type: T8 U-Tube Fluorescent Lamp
  • Wattage: 32-Watt
  • Base: 2-Pin Medium Base
  • Lumens: 2850
  • CRI: 82
  • Color Temperature: 3500K
  • Length: 22-1/2-Inch
  • Series: Octron 800 Curvalume Ecologic

Typical Applications

  • Commercial Ceiling Troffers and U-Bent Fixtures
  • Office and Retail General Lighting
  • Replacement for Legacy U-Tube Fluorescent Lamps
  • Industrial and Institutional Lighting Systems

Why Sylvania?

Sylvania's Octron 800 Curvalume Ecologic platform combines a durable U-bent construction with consistent 3500K, 82 CRI light output for dependable performance in commercial fixtures. The 21670 lamp gives facility managers and electrical contractors a reliable, energy-conscious replacement option for U-tube fluorescent applications.

Manufacturer Resources

Product Specs

Product Type:
Fluorescent Tube
Bulb Base:
2-Pin Medium Base
list_batch:
SYL-20260924
Product Subgroup:
Lamps & Bulbs
Product Wattage:
32W
Product Group:
Lighting
Lumens:
2850
CRI:
82
Department:
Electrical

Sylvania 21670 – Frequently Asked Questions

1) Will a Sylvania Octron U-tube T8 lamp fit a 2x2 ceiling troffer?
Yes. The Octron Curvalume U-tube is 22-1/2 inches overall, which is the bent-lamp footprint 2x2 troffers and other U-bent commercial fixtures are built around. A straight 4-foot T8 will not go in those housings at all.
2) What base does the Sylvania Octron 32W U-tube use, and will it drop into my existing U-bend sockets?
It uses a 2-pin medium bi-pin base, the standard socket on U-tube fluorescent fixtures, so it seats in existing U-bend lampholders without changing the sockets.
3) Can I use this 32W T8 U-tube to replace old T12 U-tube lamps?
Only if the fixture is running a T8 ballast. The 32W T8 Octron U-tube draws less energy than a legacy T12 U-bend lamp, but T12 magnetic ballasts will not operate it correctly. Fixtures still on T12 gear need the ballast changed or the fixture replaced.
4) Can a Philips 236794 T8 lamp be used in place of the Sylvania Octron U-tube 32W lamp?
No. The Sylvania Octron U-Tube T8 is a 32-watt U-bent lamp with a 22-1/2-inch overall length and a 2-pin medium base, shaped to drop into 2x2 troffers and other U-bent fixtures. The Philips 236794 is a linear T8 high output lamp rated 44 watts, so it is a straight tube at a different wattage and will not seat in a U-tube socket pair. Use the U-tube lamp where the fixture holds a bent lamp, and reserve the linear 44-watt lamp for straight-tube high output fixtures.
5) How much light does the Sylvania 21670 U-tube put out?
2850 lumens at 32 watts, with an 82 CRI. That CRI is enough for general office, retail and task lighting where color needs to read naturally, and the output is consistent across the U-bent form so one lamp per socket pair covers a 2x2 troffer cell.
6) Is this the same lamp as a straight linear T8 like the Philips Alto, or do I need the U-bend specifically?
Different form factors, and they are not interchangeable. The Sylvania Octron 21670 is a U-bent lamp for 2x2 and other short-cell fixtures. If your housing takes a straight tube instead, a linear T8 such as the Philips Alto II high CRI linear fluorescent lamp is the right family. Measure the fixture cavity before ordering.
7) If I want more light output than the Sylvania Octron U-tube 32W, what is the option?
The Sylvania Octron U-Tube T8 is a 32-watt lamp delivering 2850 lumens. For a higher output lamp, the Philips 236794 is a 44-watt T8 high output fluorescent, though it is a linear tube and requires a fixture and ballast built for straight high output lamps. Within U-bent fixtures the 32-watt U-tube remains the form factor that fits.
8) What should I order if I need better color rendering than the Sylvania Octron U-tube T8 provides?
The Sylvania Octron U-Tube T8 is rated at 82 CRI. If the space calls for higher color rendering, the Philips 479634 Alto II is a high CRI linear T8 fluorescent lamp. Note that it is a straight linear lamp rather than a U-bent one, so it suits fixtures built for linear tubes; a U-bent troffer still needs a U-tube lamp.
9) How do the Sylvania Octron and Philips Alto T8 families differ?
The Sylvania Octron U-Tube T8 is built on the Octron 800 Curvalume Ecologic platform in a U-bent 32-watt form, offered in 3000K, 3500K, and 4100K color temperatures at 82 CRI. The Philips comparables come from the Alto and Alto II series as linear T8 lamps, including a 44-watt high output lamp at 4100K and a high CRI Alto II version. The practical difference for a buyer is lamp shape: Octron Curvalume covers the bent-lamp sockets, Alto and Alto II cover straight linear sockets.
How fast can I get the Sylvania 21670 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 Sylvania 21670 come with a warranty?
Absolutely. The Sylvania 21670 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 Sylvania 21670?
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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