Topaz Lighting L4T8B8 Series 1...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$5.71
Topaz Lighting L4T8B8 Series 14W 4 Ft Double-Ended Ballast Bypass LED T8 Tube Lamp, Frosted Glass, 120-277V

Topaz Lighting L4T8B8 Series 14W 4 Ft Double-Ended Ballast Bypass LED T8 Tube Lamp, Frosted Glass, 120-277V

(No reviews yet) Write a Review

Model: L4T8B/840/14F/DE-39C

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

$5.71
Adding to cart… The item has been added
Free Shipping on orders over $199
We price match and offer bulk discounts! Click Add to Quote. It's quick and easy.
✨
Earn points with this purchase! You can redeem points for giftcards, iPads, XBox's and more. View Rewards
Free Keying on all locks
You may also like

Topaz Lighting L4T8B8 Series 14W 4 Ft Double-Ended Ballast Bypass LED T8 Tube Lamp, Frosted Glass, 120-277V

The Topaz Lighting L4T8B8 Series is a 14W, 4 Ft double-ended ballast bypass LED T8 tube lamp engineered as an easy, code-compliant direct replacement for fluorescent T8 systems. Delivering 1,700 lumens with a wide 210° beam angle through a frosted glass diffuser, this lamp is available in 4000K Neutral White or 5000K Daylight color temperatures to match project lighting needs, and operates on 120-277VAC for broad compatibility across commercial electrical systems. With a dual-end bypass connection and a rated lifespan of 50,000 hours, it is a low-maintenance, energy-efficient upgrade for offices, retail, hospitality, and warehouse environments.

Key Features

  • Light Output: 1,700 lumens with a 210° beam angle and frosted glass diffuser deliver broad, even illumination.
  • Color Temperature Options: Available in 4000K Neutral White or 5000K Daylight to suit the application.
  • Double-Ended Ballast Bypass: Dual-end bypass wiring removes the existing fluorescent ballast from the circuit, cutting installation labor and the need for non-shunted sockets.
  • Voltage Compatibility: Operates on 120-277VAC, suiting a wide range of commercial and industrial electrical systems.
  • Long Lifespan: Rated at 50,000 hours, reducing lamp replacement frequency and maintenance costs.
  • Frosted Glass Construction: A high-quality frosted glass envelope provides uniform light diffusion and a clean, professional appearance.
  • Compact Wattage: 14W LED design replaces higher-wattage fluorescent T8 lamps for meaningful energy savings.

Certifications & Compliance

  • Suitable for 120-277VAC electrical systems
  • Ballast bypass (direct wire) configuration for code-compliant installation

Technical Specifications

  • Product Type: LED Lamp
  • Product Wattage: 14W

Typical Applications

  • Office and Commercial Lighting Retrofits
  • Retail and Hospitality Lighting Upgrades
  • Warehouse and Industrial Facility Lighting
  • Fluorescent T8 System Replacements (Ballast Bypass)
  • New Construction and Renovation Projects

Why Topaz Lighting?

Topaz Lighting's L4T8B8 Series LED T8 tubes pair frosted glass construction with a double-ended ballast bypass design that simplifies installation while delivering reliable, long-lasting performance. Rated at 50,000 hours and compatible with 120-277VAC systems in both 4000K and 5000K color temperatures, these lamps are engineered to meet the demands of professional electrical contractors and facility managers seeking energy-efficient, low-maintenance lighting solutions.

Product Specs

Product Type:
LED Lamp
Product Wattage:
14W
Light Temperature:
4000K
Department:
Electrical
Product Group:
Lighting
Product Subgroup:
LED Lamps & Bulbs
Product Color:
Frosted Glass
Voltage Rating:
120-277V
Lumens:
1700
Product Material:
Frosted Glass

Topaz Lighting L4T8B/840/14F/DE-39C – Frequently Asked Questions

1) Do I need to remove the fluorescent ballast to install the Topaz L4T8B8 LED T8 tube?
Yes. The L4T8B8 is a double-ended ballast bypass (direct wire) lamp, so the existing fluorescent ballast comes out of the circuit and line voltage is wired straight to the sockets. Power goes to one end, neutral to the other. Because it is dual-end bypass rather than single-end, you don't have to swap the fixture over to non-shunted tombstones, which is where most of the labor goes on a single-ended retrofit.
2) Will a Topaz L4T8B8 LED T8 tube run on 277V in my commercial building?
It runs on any supply from 120 to 277VAC, so the same lamp works on 120V in an office and on 277V in a warehouse or industrial panel without a different part number. Only the color temperature changes between the two versions, not the voltage.
3) What color temperature should I order, 4000K or 5000K, for an office versus a warehouse?
Two choices only: 4000K neutral white (MPN L4T8B/840/14F/DE-39C) and 5000K daylight (MPN L4T8B/850/14F/DE-39C). 4000K is the usual pick for offices, retail and hospitality where you want the light to sit close to what's already installed in most commercial ceilings. 5000K reads cooler and bluer and is what most people put in warehouses, shops and back-of-house. If you're relamping part of a building, match whatever the adjacent fixtures already are, because mixing the two in one room is obvious from the floor.
4) Is 14W and 1700 lumens enough to replace the 32W fluorescent T8 tubes in my fixtures?
The lamp draws 14W and puts out 1,700 lumens, which is the normal output band for a 4 ft LED replacement of a 32W fluorescent T8. You're cutting roughly 18W per lamp, so a 4-lamp troffer drops about 72W. Worth knowing: a 32W fluorescent starts higher than 1,700 lumens but depreciates hard over its life, so the LED holds closer to its rated output for longer. In a space that's already dim on fluorescent, count lamps and check the layout before assuming a one-for-one swap keeps the footcandles you want.
5) Can I put a ballast bypass LED T8 in a fixture that still has a working ballast, or do I need a plug-and-play tube?
No. A bypass lamp has to have the ballast removed and the sockets wired directly to line voltage. Drop one into a live ballasted fixture and you'll damage the lamp. If you want to leave the ballast in place and just swap tubes, you need a Type A plug-and-play lamp instead, which is a different product. Type B bypass like the L4T8B8 costs you the rewire once but takes the ballast out of the maintenance picture permanently, which is why it's the usual specification when the fixtures are being touched anyway.
6) Is the Topaz L4T8B8 a 4 foot tube and will it fit my existing T8 troffer sockets?
It's a nominal 4 ft T8 lamp with standard bi-pin ends, so it sits in the same sockets and the same fixture length as the fluorescent T8 it replaces. No fixture change, no new lampholders for a double-ended install. What does change is the wiring behind the sockets.
7) Will a glass LED T8 tube shatter like a fluorescent lamp, and does it need a shatterproof coating for a food or healthcare area?
The envelope is frosted glass, not plastic. It handles heat and ages better than a plastic tube and won't yellow, but it is glass and it can break. For kitchens, food prep, processing areas or anywhere your facility requires a shatter-containment lamp, you want a coated or plastic-bodied tube instead of this one. For offices, retail, hospitality and general warehouse bays, glass is the standard choice.
8) Can I mix Topaz L4T8B8 tubes with the fluorescent lamps still in the other fixtures on the same floor?
Not in the same fixture, and it's a bad idea in the same room. Each fixture is either rewired for bypass or it isn't, so a single troffer has to be all LED. Across a floor you can phase it fixture by fixture, but a rewired bay next to a fluorescent bay will read as a color and brightness mismatch, especially with the 5000K daylight version against aging fluorescent. If you're relamping in stages, do it room by room and stick to one color temperature across the whole building.
9) Does a ballast bypass LED T8 retrofit still meet code, and what does my electrician need to do to the fixture?
Direct wire is a recognized retrofit method, but the fixture has to be relabeled after the conversion so the next person who opens it knows the ballast is gone and the sockets are at line voltage. That's an electrician's job, not a lamp swap, and it's why this is usually done during a scheduled fixture upgrade rather than piecemeal by a building maintenance tech. The lamp itself is built for that configuration and runs on the 120-277VAC you already have at the fixture.
How fast can I get the Topaz Lighting L4T8B/840/14F/DE-39C 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 L4T8B/840/14F/DE-39C come with a warranty?
Absolutely. The Topaz Lighting L4T8B/840/14F/DE-39C 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 L4T8B/840/14F/DE-39C?
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 L4T8B/840/14F/DE-39C 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.
!