You may also like
Sylvania Octron 800 Ecologic T8 Fluorescent Lamp Series
Model: SYL-P481282
Sylvania Octron 800 Ecologic T8 Fluorescent Lamp SeriesThe Sylvania Octron® 800 Ecologic® series is a family of 24-inch T8 fluorescent lamps engineered for commercial and industrial lighting systems,...
Sylvania
Starting at
$5.39
Sylvania Octron 800 Ecologic T8 Fluorescent Lamp
The Sylvania Octron® 800 Ecologic® series is a family of T8 fluorescent lamps engineered for reliable general-purpose lighting in commercial and industrial spaces, available in multiple model configurations to match different fixture and lumen-output requirements. Every lamp in this series shares a 2-Pin Medium Bi Pin base for secure, standardized fixture connection and a T8 bulb type for direct compatibility with standard T8 fixtures and troffers. Depending on the specific model selected, wattage, length, lumen output, color temperature, and CRI can vary, allowing facility managers and electrical contractors to select the configuration that best fits their fixture and lighting design needs. Representative specifications within this series include wattages such as 25W, color temperatures such as 3500K, an 82 CRI rating for accurate color rendering, and an average rated life of 30,000 hours.
Key Features
- Lamp Type: T8 fluorescent lamp for use in standard T8 fixtures and troffers.
- Base Type: 2-Pin Medium Bi Pin base for secure, standardized fixture connection across the series.
- Model Options: Available across multiple models (including 21779, 21781, 22139, and 22143) with wattage and length configurations to suit different fixture requirements.
- Representative Wattage: Configurations such as 25-Watt balance brightness and energy consumption for everyday commercial lighting needs.
- Color Temperature: Configurations such as 3500K produce a neutral-warm white light suited to office and retail environments.
- Color Rendering: An 82 CRI rating ensures accurate color reproduction for tasks requiring visual clarity.
- Average Rated Life: 30,000 hours provides long-term, dependable performance and reduced relamping frequency.
- Octron® 800 Ecologic® Series: Part of Sylvania's established Octron 800 Ecologic lamp line, engineered for consistent performance.
Technical Specifications
- Bulb Type: T8
- Base: Medium Bi Pin
- Product Wattage: 25W (representative; varies by model)
- CRI: 82
- Average Rated Life: 30,000 hours
- Series: Octron® 800 Ecologic®
- Model Options: 21779, 21781, 22139, 22143
Typical Applications
- Office and Commercial Lighting Fixtures
- Retail and Showroom Lighting
- Warehouse and Industrial Facilities
- Standard T8 Troffers and Strip Fixtures
- Renovation and Lamp Replacement Projects
Why Sylvania?
Sylvania's Octron® 800 Ecologic® series is engineered to deliver dependable T8 fluorescent performance with consistent base compatibility, color rendering, and long rated life across its model lineup, making it a practical choice for facility managers and electrical contractors upgrading or maintaining standard fluorescent lighting systems. With a shared 2-Pin Medium Bi Pin base, an 82 CRI rating, and a 30,000-hour average rated life, the Octron 800 Ecologic series provides professional-grade lighting suited to everyday commercial and industrial applications across its available model configurations.
Manufacturer Resources
Product Specs
- Product Type:
- Fluorescent Tube
- Product Wattage:
- 25W
- Light Temperature:
- 3500K
- Bulb Base:
- Medium Bi Pin
- Lumens:
- 2150
- CRI:
- 82
- Series:
- Octron 800 Ecologic
- Department:
- Electrical
- Product Group:
- Lighting
- Product Subgroup:
- Lamps & Bulbs
- list_batch:
- SYL-20260928
- Base:
- Medium Bi Pin
- Bulb Type:
- T8
- Average Rated Life:
- 30000 hours
- Product Material:
- Glass
Sylvania 21779 – Frequently Asked Questions
1) Will a Sylvania Octron 800 Ecologic T8 lamp fit my existing T8 troffer sockets?
Yes, if the fixture uses standard T8 bi-pin sockets. Every lamp in the Octron 800 Ecologic line is a T8 tube on a medium bi-pin (2-pin) base, which is the standard socket on commercial T8 troffers and strip fixtures. It drops into the lampholders without any fixture change.
2) How much light does the 25W Sylvania Octron T8 put out compared with a standard 32W T8?
The 25-watt Octron 800 Ecologic configuration is rated 2150 lumens. A standard 4-foot 32W T8 is typically around 2800 to 2950 lumens, so the 25W trades roughly a quarter of the output for lower energy use. In spaces already over-lit, or where you are relamping multi-lamp troffers, that is usually acceptable; in a warehouse running at minimum footcandles it is not.
3) Which Sylvania Octron model number do I order?
Four models are offered: 21779, 21781, 22139 and 22143. All share the T8 tube and medium bi-pin base, but wattage, length and lumen output vary by model, so match the model to the tube length already in your fixture (the existing lamp is printed with its own model or wattage). Ordering by model number is the only way to be sure you get the same length.
4) Can I use these T8 fluorescent lamps in a high-output fixture?
No. The Octron 800 Ecologic lamps are standard medium bi-pin T8 lamps, not high output. High output T8 fixtures use HO lamps on HO ballasts, so you would need something like the Philips Lighting 236794 T8 High Output 44-watt lamp instead. Putting a standard 25W lamp on an HO ballast is the wrong pairing.
5) What is the Philips equivalent to the Sylvania Octron 800 Ecologic T8 lamp?
The closest Philips linear fluorescent alternative in the same T8 format is the Philips Alto II T8 high CRI linear fluorescent lamp, model 479634. The Sylvania Octron 800 Ecologic runs a Medium Bi Pin base with 82 CRI, 3500K color temperature, 2150 lumens at 25W, and a 30,000-hour average rated life. The Philips 479634 is identified as a high CRI lamp in the Alto II series, so confirm the color temperature and wattage you need matches the fixture before mixing the two in the same room - fluorescent tubes at different color temperatures read visibly different side by side in the same troffer.
6) I need more light output than a 25W T8 - what should I use instead of the Octron 800 Ecologic?
For higher output in the same T8 tube format, step up to a high output lamp such as the Philips 236794 T8 high output fluorescent lamp, rated 44 watts at 4100K. The Sylvania Octron 800 Ecologic configuration at 25W delivers 2150 lumens at 3500K. The important check is the ballast: high output T8 lamps require a ballast matched to that lamp's current, so a fixture wired for a standard 25W T8 will not drive a 44W high output tube. Confirm the ballast labeling in the fixture before ordering either one.
7) What light color will a 3500K 82 CRI T8 lamp give me in an office?
3500K is a neutral white, between the warmer 3000K and the cooler 4100K often used in offices. With a CRI of 82, colors read accurately enough for general office, retail and showroom work. If your other openings in the building are lamped at 4100K, mixing in 3500K will be visible, so keep a floor or a wing on one color temperature.
8) How long do Sylvania Octron 800 Ecologic T8 lamps last before relamping?
Average rated life is 30,000 hours. In a building burning lights about 12 hours a day, five days a week, that is roughly nine to ten years of service, which is why these get specified for group relamping schedules in offices and schools rather than one-off replacement.
9) For a space where color accuracy matters, is the Octron 800 Ecologic the right pick or should I go high CRI?
The Sylvania Octron 800 Ecologic carries an 82 CRI rating, which covers general office, retail, and warehouse work. Where color judgment is part of the task - paint matching, fabric, print proofing, medical areas - a lamp sold specifically as high CRI is the better fit, such as the Philips 479634 Alto II T8 high CRI linear fluorescent lamp. Both are T8 linear tubes, so the fixture and base style are the same class of install; the difference is in color rendering, and you should keep one or the other throughout a given room rather than mixing.
10) Can I drop a Philips T8 high output lamp into a fixture currently running Sylvania Octron 800 Ecologic tubes?
Not without checking the ballast. The Sylvania Octron 800 Ecologic is a standard T8 lamp on a Medium Bi Pin base, with a 25W configuration at 2150 lumens. The Philips 236794 is a T8 high output lamp rated 44 watts, and high output lamps need a ballast designed for them even though the tube diameter and pin style look identical. The lamps physically seat in the same style of socket, which is exactly why this swap gets made by mistake - verify the ballast type stamped inside the fixture first.
11) I am standardizing lamps across a building at 3500K - do the Philips alternatives match?
The Sylvania Octron 800 Ecologic configuration is 3500K, a neutral-warm white. The Philips 236794 T8 high output lamp is a 4100K lamp, which reads cooler and will be visibly different in adjacent fixtures. If a consistent 3500K appearance across a floor is the goal, standardize on the Octron 800 Ecologic rather than mixing in a 4100K tube, and specify the color temperature on every reorder so a substitution does not enter the fleet later.
12) Are these glass fluorescent tubes or shatter-resistant plastic-coated lamps?
The Octron 800 Ecologic T8 is a glass tube with no protective sleeve. For food prep areas, gyms, or anywhere a broken lamp is a contamination or injury issue, you want a coated or sleeved lamp instead of a bare glass one.
How fast can I get the Sylvania 21779 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 21779 come with a warranty?
Absolutely. The Sylvania 21779 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 21779?
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
Why buy the Sylvania 21779 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.