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SATCO Lighting S11971 13W T8 U-Bend LED, 50000 Hours, Medium bi-pin Base, 1950 Lumens, 3500K, Type A/B, Ballast Dependent or Ballast Bypass
13 Watt T8 U-Bend LED - 50000 Hours - Medium bi-pin base - 1950 Lumens - 3500K - Type A/B - Ballast Dependent or Ballast Bypass - Single or Double Ended Wiring
Manufacturer Resources
Spec Sheet
Product Specs
- Amps:
- .15A with Electronic Ballast; .12A Ballast Bypass
- Avg Rated Hours:
- 50000
- Ballasting Requirements:
- Ballast required (Type A) or Ballast Bypass (Type B)
- Burning Position:
- Universal
- CA Web Text:
- Lawful for sale
- CCT Selectable:
- No
- CRI:
- 83
- DLC Approved:
- Yes
- Dimmable:
- Yes
- Enclosure Rating:
- Enclosed Rated Lamp
- FCC Compliant:
- Yes
- Housing Color:
- White
- Lamp Base:
- Medium Bi Pin
- Lamp Filament:
- LED
- Lamp Shape:
- T8
- Lens Finish:
- Frost
- Lens Material:
- Plastic (PS)
- Lumens:
- 1950L
- Operating Frequency:
- 50/60Hz
- Product Type:
- U-Bend
- Subcategory:
- LED
- Technology:
- LED
- Three-Way:
- No
- Warranty:
- 5 Year Limited - T8 LED Bulbs
- Product Group:
- Indoor Lighting
- Product Subgroup:
- Light Bulbs
- Incandescent Equivalent:
- 50W
- Location Rating:
- Damp
- Base Material:
- Plastic
- Product Voltage:
- 120V-277V
- Beam Spread Angle:
- 160
- Light Temperature:
- 3500K
- Product Category:
- Light Bulbs
- Product Wattage:
- 13W
- Product Length:
- 22.5 in
- Product Weight:
- 0.77 lb
- Product Material:
- Plastic
Satco Lighting S11971 – Frequently Asked Questions
1) Can the Satco S11971 U-bend LED run on my existing fluorescent ballast, or do I have to rewire?
Either way. The S11971 is a Type A/B lamp: it will operate on a compatible existing electronic ballast (Type A) or you can bypass the ballast and wire line voltage directly to the sockets (Type B). Bypass wiring can be single-ended or double-ended. Current draw is .15A on an electronic ballast and .12A in bypass, so a bypass retrofit cuts the fixture load a bit as well as removing the ballast as a future failure point.
2) Will a 22-1/2 inch U-bend LED fit my 2x2 troffer?
The S11971 measures 22.5 inches in overall length with a medium bi-pin base, which is the standard replacement geometry for a U-bend fluorescent in a 2x2 troffer. Check the leg spacing of the lamp you are pulling out, since U-bends come in different leg spacings even at the same length, and confirm your sockets are medium bi-pin rather than single-pin.
3) Will the S11971 work on 277 volt building power?
Yes. The lamp is rated 120V through 277V at 50/60Hz, so it covers both the 120V circuits in most tenant spaces and the 277V lighting circuits common in commercial and institutional buildings. That single rating means one part number across a mixed-voltage facility.
4) Can I use this LED U-bend in an enclosed or damp location fixture like a parking garage or kitchen?
It is an enclosed rated lamp, so sealed and gasketed troffers and wraps are fine, which is not true of every LED tube. Location rating is damp, which covers covered walkways, parking structures, and bathrooms. Do not use it in a wet location where water hits the fixture directly.
5) How much light does the 13W Satco U-bend put out compared with the fluorescent it replaces?
1950 lumens at 13 watts, with a 3500K neutral white color and 83 CRI. The beam spreads 160 degrees, so light distributes across the troffer lens the way a fluorescent tube does rather than pooling. Satco lists it as a 50W incandescent equivalent, but in practice it is the output substitute for a U-bend fluorescent in a 2x2 fixture.
6) Is the Satco S11971 U-bend LED dimmable?
Yes, it is listed as dimmable. Dimming on a Type A/B tube depends on how it is wired: in ballast bypass the control has to be a line-voltage dimmer compatible with LED loads, and in ballast mode the dimming is handled by a dimming ballast. It is not a three-way lamp.
7) Will this 3500K U-bend match the other lamps in my building?
The S11971 is fixed at 3500K and is not a color-selectable lamp, so what you order is what you get. 3500K reads as neutral white, between the warmer 3000K and the cooler 4000K often used in offices and schools. If your other troffers are 4000K the difference will be visible in the same room, so standardize by space rather than mixing within a ceiling.
8) What is the lamp made of, and will it shatter like a fluorescent tube if it is dropped?
The S11971 is a plastic lamp, not glass: PS plastic lens with a frosted finish, white housing, and a plastic base. That matters in food service, healthcare, and school corridors where a broken glass tube is a contamination or injury problem. Each lamp weighs 0.77 lb.
9) Does it matter which way up I install this LED U-bend in the fixture?
No. Burning position is universal, so the S11971 can be installed with the lens facing down, up, or sideways without affecting rated life. Rated average life is 50,000 hours.
How fast can I get the Satco Lighting S11971 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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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 Satco Lighting S11971 come with a warranty?
Absolutely. The Satco Lighting S11971 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 Satco Lighting S11971?
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