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12W T8 LED Tube - 1,600 Lumens - 4ft - Single End Ballast Bypass Type B - 32W Equivalent - 5000K/4000K

Part Number: T8B-xK12S-GF


  • Replaces 4' F32T8 fluorescent tubes
  • Ballast bypass type B
  • Mercury-free, instant-on
  • UL and DLC Listed
  • 5-Year warranty
Select Color Options:
Cool 5000K
Natural 4000K
Select Pack:
Starting at $4.95 ea. (per Bulb)
Volume price as low as $4.14
Orders Ship Today!  1 Hour and 5 Minutes remaining
  • Select options to see various notes.
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These 12-watt LED T8 tubes are the energy-saving alternatives to 32-watt fluorescent tube lights. The 4' ballast-bypass tube light bulb can be used in direct-wire fixtures. It emits 1,600 lumens of cool or natural white illumination. Unlike fluorescent lights, this LED T8 tube turns on instantly—even in cold weather—and is simple to dispose of because it contains no harmful mercury. With a life expectancy 5 times as long as fluorescent tubes, the LED light reduces costly repairs, disposal fees, and the need for replacements. Price per bulb, 4-pack, 25-pack, or 50-pack. It's perfect for basements, offices, schools, hospitals, factories, and more.

5 Years
Super Bright LEDs, Inc. offers a 5-year warranty to protect against manufacturer defects and malfunctions. If you experience failure of an LED or other component not caused by negligence, abuse, unauthorized repair or disassembly, we will replace the product within the warranty period. If the same product is no longer available, a product of equal value may be substituted. Read More
The DesignLights Consortium® (DLC®) partners with energy-efficiency groups and utility companies to establish a set of standards for commercial LED light fixtures. The product is tested and must meet quality, energy-efficiency, and performance requirements to be added to the DLC's Qualified Products List. For more information, click here. To view all of our DLC® listed products, click here
UL Listed
Underwriters Laboratories (UL) LLC is an independent testing agency that works to verify product safety and quality. A UL-Listed label means that product samples have been tested by UL and that the product meets their Standards for Safety requirements.
  • Factories
  • Garages
  • Daycare Centers
  • Hospitals
  • Schools
  • Offices
  • Commercial Complexes
  • Food Processing Plants

T8B-xK12S-GF Supported Electrical Configurations

Connection Types

Type B Single-End LED Tube Lights are wired to a single set of pins at one end of the tube light itself.

Single Ended

Electrically connected from one end of the tube, one pin connecting to line and one to neutral. This type requires non-shunted sockets and rewiring

Ballast Compatibility

Bypassing ballast is required for Single-End Type B LED Tube Light installations and will not function if connection to the ballast is left intact. This is a popular solution when relamping, due to the likelihood of an eventual ballast failure.

How To Wire:

Socket Wiring

Type B Single-End LED Tube Lights require bypassing of the ballast and rewiring sockets in one end of the fixture to a non-shunted configuration.


Contacts in the same socket (tombstone) are split, but can be either the same polarity or opposing polarity depending on the way the socket (tombstone) is wired.

Determining Shunted or Non-Shunted

Below are some typical examples of how shunted or non-shunted sockets might look. You should always check the socket terminals with a multimeter before installing bulbs or rewiring. If the two sides of a socket have continuity, then the socket is shunted regardless of appearance.

Need To Wire Differently?

LED tubes lights can be wired with or without ballast, and from either end depending on the tube type.


Swipe left to see additional specifications
Part NOColor Temperature
LED QuantityLED Wattage
Intensity per LEDMilliwatt
CCT / Wavelength
Price Ea.Product WeightLumen Per DollarIP Rating
-T8B-40K12S-GFNatural 4000K ----4000 K$4.95-323.23 lumen/dollar-
-T8B-50K12S-GFCool 5000K ----5000 K$4.95-323.23 lumen/dollar-
-T8B-40K12S-GF-4PKNatural 4000K ----4000 K$19.60-326.53 lumen/dollar-
-T8B-40K12S-GF-25PKNatural 4000K ----4000 K$119.95-333.47 lumen/dollar-
-T8B-40K12S-GF-50PKNatural 4000K ----4000 K$229.95-347.9 lumen/dollar-
-T8B-50K12S-GF-4PKCool 5000K ----5000 K(Discontinued)-326.53 lumen/dollar-
-T8B-50K12S-GF-25PKCool 5000K ----5000 K(Discontinued)-333.47 lumen/dollar-
-T8B-50K12S-GF-50PKCool 5000K ----5000 K(Discontinued)-347.9 lumen/dollar-
T8B-xK12S-GF - 12W T8 LED Tube - 1,600 Lumens - 4ft - Ballast Bypass Type B - 32W Equivalent - 5000K/4000K
12W T8 LED Tube - 1,600 Lumens - 4ft - Ballast Bypass Type B - 32W Equivalent - 5000K/4000K


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Would be better if you had them in clear these ones are good for installing in the house but I would like clear ones for in my garage

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Reviewed On

Easy retrofit to upgrade to LEDs

Great product concept with all the electronics and LEDs packed in the tube. Converting old fixtures is simple. No new power supply needed. And the light output is great.

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Reviewed On

They work good, eliminates the ballast and reduces the power about 100 wats per fixture.

Helpful? Yes (0) No (0)

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Reviewed On

Dim bulbs

Not 1600 lumens each as advertised. 4 of them in a single fixture is less bright than the 15 year old florescent bulbs. Very disappointed!

Helpful? Yes (0) No (0)

Response from Super Bright LEDs:

We are sorry to hear that those did not work for you. We do offer a variety of bulbs in that style. Our Technical Support team can work with you in finding a solution for your application.

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