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  • Airport Lighting
  • Aviation Obstruction Lighting
  • Emergency Vehicle Warning Lights, Lamps & Bulbs
  • Fluorescent Light Bulbs
  • Halogen Light Bulbs
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  • Photography Lighting
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  • Westinghouse Light Bulbs
  • Clearance and Closeouts - Full Lots of Bulbs

    • Shop by Brand

  • EIKO
  • TCP
  • SYLVANIA LEDVANCE
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  • USHIO
  • TWR
  • HUGHEY & PHILLIPS
  • GENESIS LAMP
  • WHELEN
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  • View all Brands

    • Circline Shaped Fluorescent Light Bulbs

    • FC16T9/D/RS Fluorescent Light Bulb

      FC16T9/D/RS Fluorescent Light Bulb

      Description: FC16T9/D/RS Fluorescent Light Bulb - Fluorescent Circline lamp, 16" outside diameter, Daylight phosphor, 6500K color temperature, 76 CRI, can be operated by rapid start or preheat ballasts Light Bulb Cross References (Also known as} ...

      $16.50 $15.75
      Add to Cart
    • FC12T9/D/RS Fluorescent Light Bulb

      FC12T9/D/RS Fluorescent Light Bulb

      FC12T9/D/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 12" outside diameter, Daylight phosphor, 6500K color temperature, 76 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania FC12T9/D/RS Fluorescent...

      $9.35 $8.90
      Add to Cart
    • FC8T9/D/RS Fluorescent Light Bulb

      FC8T9/D/RS Fluorescent Light Bulb

      Description: FC8T9/D/RS Fluorescent Light Bulb - Fluorescent Circline lamp, 8" outside diameter, Daylight phosphor, 6500K color temperature, 76 CRI, can be operated by rapid start or preheat ballasts Light Bulb Cross References (Also known as} FC8T9/D/RS

      $6.09 $5.77
      Add to Cart
    • FC6T9/CW/RS Fluorescent Light Bulb

      FC6T9/CW/RS Fluorescent Light Bulb

      FC6T9/CW/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 6" outside diameter, Cool White phosphor, 4200K color temperature, 60 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania Light Bulb Cross...

      $9.35 $8.90
      Add to Cart
    • FC16T9/WW/RS Fluorescent Light Bulb

      FC16T9/WW/RS Fluorescent Light Bulb

      Description: FC16T9/WW/RS Fluorescent Light Bulb - Fluorescent Circline lamp, 16" outside diameter, Warm White phosphor, 3000K color temperature, 52 CRI, can be operated by rapid start or preheat ballasts Light Bulb Cross References (Also known as} ...

      $16.50 $15.75
      Add to Cart
    • FC12T9/WW/RS Fluorescent Light Bulb

      FC12T9/WW/RS Fluorescent Light Bulb

      FC12T9/WW/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 12" outside diameter, Warm White phosphor, 3000K color temperature, 52 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania FC12T9/WW/RS...

      $7.25 $6.90
      Add to Cart
    • FC6T9/WW/RS Fluorescent Light Bulb

      FC6T9/WW/RS Fluorescent Light Bulb

      Description: FC6T9/WW/RS Fluorescent Light Bulb - Fluorescent Circline lamp, 6" outside diameter, Warm White phosphor, 3000K color temperature, 52 CRI, can be operated by rapid start or preheat ballasts Light Bulb Cross References (Also known as} ...

      $9.02 $8.61
      Add to Cart
    • FC12T9/CW/RS Fluorescent Light Bulb

      FC12T9/CW/RS Fluorescent Light Bulb

      FC12T9/CW/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 12" outside diameter, Cool White phosphor, 4200K color temperature, 60 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania FC12T9/CW/RS...

      $8.31 $7.91
      Add to Cart
    • FC8T9/WW/RS Fluorescent Light Bulb

      FC8T9/WW/RS Fluorescent Light Bulb

      FC8T9/WW/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 8" outside diameter, Warm White phosphor, 3000K color temperature, 52 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania FC8T9/WW/RS...

      $5.30 $5.04
      Add to Cart
    • FC8T9/CW/RS Fluorescent Light Bulb

      FC8T9/CW/RS Fluorescent Light Bulb

      FC8T9/CW/RS Fluorescent Light Bulb - Description: Fluorescent Circline lamp, 8" outside diameter, Cool White phosphor, 4200K color temperature, 60 CRI, can be operated by rapid start or preheat ballasts. Manufacturer - Sylvania Light Bulb Cross...

      $7.06 $6.72
      Add to Cart
    • FC16T9/CW/RS Fluorescent Light Bulb

      FC16T9/CW/RS Fluorescent Light Bulb

      Description: FC16T9/CW/RS Fluorescent Light Bulb - Fluorescent Circline lamp, 16" outside diameter, Cool White phosphor, 4200K color temperature, 60 CRI, can be operated by rapid start or preheat ballasts Light Bulb Cross References (Also known as} ...

      $9.36 $8.93
      Add to Cart
    Compare Selected

    Circline Shaped Fluorescent Light Bulbs

    The most common form of fluorescent lamp is a tube with two pins on each end. The diameter of the tube is described in eighths of an inch, as it is for incandescent lamps, so a fluorescent lamp 1½ inches in diameter is a T-12. The 2-pin bases (called bi-pin bases) come in several sizes, but by far the most common in homes is the medium bi-pin.