Topaz Lighting L3T8D840 Dual M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$8.64
Topaz Lighting L3T8D840 Dual Mode LED T8 Linear Tube Lamp, 12W 5000K Frost Glass, Type A+B

Topaz Lighting L3T8D840 Dual Mode LED T8 Linear Tube Lamp, 12W 5000K Frost Glass, Type A+B

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Model: L4T8D/850/12/F-70

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

$8.64
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Topaz Lighting L3T8D840 Dual Mode LED T8 Linear Tube Lamp, 12W 5000K Frost Glass, Type A+B

The Topaz Lighting L3T8D840 Dual Mode LED T8 Linear Tube Lamp is a 12W frosted glass lamp available in 36" and 48" lengths, engineered for maximum installation flexibility in retrofit and new construction projects. Rated at 5000K daylight color temperature with 1,800 lumens and an 80 CRI, this UL Listed Type A+B lamp operates plug-and-play with compatible instant start electronic ballasts or can be wired to bypass the ballast entirely for additional energy savings. With a 50,000-hour rated lifespan and a 310-degree beam angle, it is an ideal high-efficiency solution for commercial and industrial overhead lighting environments.

Key Features

  • Available Lengths: Offered in 36" and 48" T8 linear tube formats to fit a range of fixture configurations.
  • Dual Mode (Type A+B) Operation: Compatible with instant start electronic ballasts for plug-and-play retrofit, with the option to bypass the ballast for greater energy savings and extended lamp life.
  • Light Output: Delivers 1,800 lumens at 12W with a 5000K daylight color temperature and 80 CRI, providing bright, crisp illumination suited for task-intensive environments.
  • Frosted Glass Construction: Frosted glass envelope provides improved optical efficiency, a traditional fluorescent lamp appearance, and glare-reduced light distribution across a 310-degree beam angle.
  • High Efficiency & Long Life: 50,000-hour rated lifespan with an internal driver, significantly reducing maintenance frequency and long-term operating costs.
  • Enclosed Fixture Suitability: Suitable for use in enclosed fixtures, broadening compatibility with existing commercial fixture housings.

Certifications & Compliance

  • UL Listed, Type A+B (TYPE AB)
  • Suitable for Use in Enclosed Fixtures

Technical Specifications

  • Product Type: LED Lamp
  • Product Wattage: 12W

Typical Applications

  • Classroom and Educational Facility Lighting
  • Office and Conference Room Overhead Lighting
  • Commercial and Industrial Retrofit Projects
  • Hallway and Corridor Lighting
  • New Construction Linear Fluorescent Replacement
  • Enclosed Fixture Installations

Typical Applications

Why Topaz Lighting?

Topaz Lighting's Dual Mode LED T8 tubes are built with frosted glass construction and an internal driver, delivering reliable, code-compliant performance across a wide range of commercial and industrial applications. The UL Listed Type A+B design simplifies the retrofit process by eliminating the need to choose between ballast-compatible and ballast-bypass solutions, and the 36" and 48" length options make it easy to match existing fixtures. Professionals trust Topaz Lighting for energy-efficient, long-life lamps that meet the demands of modern electrical installations.

Product Specs

Product Type:
LED Tube
Product Wattage:
12W
Light Temperature:
5000K
Listing:
UL Listed
Department:
Electrical
Product Group:
Lighting
Product Subgroup:
Lamps & Bulbs
Product Material:
Frosted Glass
Lumens:
1,800
CRI:
80
Configuration:
Type A+B

Topaz Lighting L4T8D/850/12/F-70 – Frequently Asked Questions

1) Can the Topaz L3T8D840 LED T8 tube be installed without rewiring the fixture, or do I have to bypass the ballast?
Either way works. It's a Type A+B dual mode lamp, so it runs plug and play on a compatible instant start electronic ballast with no rewiring, or you can pull the ballast and wire the sockets direct to line voltage for more savings. That's the point of A+B: you don't have to decide which retrofit path you're on before you order, which matters on a building where some fixtures still have good ballasts and some don't.
2) Can this LED T8 tube go in an enclosed or gasketed fixture?
Yes. The Topaz dual mode T8 is UL Listed and rated suitable for use in enclosed fixtures, so wrap lenses, vaportight strips, and closed wraparound housings are fair game. A lot of LED tubes are not rated for enclosed use because trapped heat shortens driver life, so this is worth checking before you standardize on a lamp for a warehouse or parking garage.
3) Will a 12W LED T8 be bright enough to replace a 32W fluorescent tube?
It puts out 1,800 lumens at 12W. A worn 32W F32T8 in an older fixture is typically delivering in that same range after lumen depreciation and dirty optics, so for offices, classrooms, and corridors the swap holds up. In high-bay or task areas where you were counting on full output from new lamps, do a mock-up on one fixture before committing the building.
4) Is 5000K going to look too blue next to the 4100K fluorescents in the rest of the building?
Yes, noticeably. This lamp is 5000K daylight with 80 CRI, which reads crisp and cool white. Next to 4100K cool white fluorescent it will look distinctly bluer, so don't mix them within the same room or sightline. If you're phasing a building over, do it space by space rather than fixture by fixture.
5) If I bypass the ballast on these Topaz T8 tubes, is anything else needed for the job?
Ballast bypass means the ballast comes out and line voltage lands on the lampholders, so plan on non-shunted tombstones where the existing sockets are shunted, plus wire nuts and a bypass label for the fixture. In Type A mode none of that applies: the lamp drops straight into the existing instant start electronic ballast with no fixture work at all.
6) Glass or plastic tube? Does this Topaz T8 look like a regular fluorescent?
Frosted glass envelope, so it reads like a conventional fluorescent lamp in the fixture rather than the half-clear plastic look some LED tubes have. The frost also spreads light over a 310 degree beam angle, which keeps the fixture's lens from showing hot spots or diode dots in low-mounted office and classroom fixtures.
7) How long before we're back up on the lift changing these tubes again?
The lamp is rated 50,000 hours with an internal driver. At roughly 12 hours a day, five days a week, that's more than a decade of service, which is the main reason facilities groups move to LED T8 on high-ceiling corridors and warehouse aisles where lamp changes need a lift.
How fast can I get the Topaz Lighting L4T8D/850/12/F-70 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 Topaz Lighting L4T8D/850/12/F-70 come with a warranty?
Absolutely. The Topaz Lighting L4T8D/850/12/F-70 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 Topaz Lighting L4T8D/850/12/F-70?
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 Topaz Lighting L4T8D/850/12/F-70 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.
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