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SKU: FC16T5/CW • UPC: 700645504597



16 in. Outside Diameter

Regular price $24.99
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If you are looking for a circular T5 bulb then look no further! Four Bros FC16T5/CW T5 circline fluorescent tube features a high lumen output while producing a cool white color. With an average life of 10,000 hours, this 16 inch circline tube will outlast many bulbs in the market right now! Use with an electronic ballast and save 10 to 15 percent more.

  • Four Bros Lighting FC16T5/CW - 40 Watt - T5 Circline Fluorescent Tube - 4100K
  • Circular fluorescent bulb replacement
  • 4 Pin base
  • 16 Inch Diameter
  • Replaces FC16T5/841, FC16T5/835 bulbs


    MPN FC16T5/CW
    Safety Rating UL Listed
    Wattage 40 Watt
    Voltage 120V
    Lumens 2700 Lumens
    Color Temperature 4100K Cool White
    CRI 54
    Base Type 4 Pin, G10Q
    Bulb Shape T5 Circline
    Life Hours 10,000 Hours
    Light Source Fluorescent
    Outside Diameter 16"

    Questions & Answers

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    Frequently Asked Questions

    Which circline wattage do I need?

    Determine the wattage of the bulb you are trying to replace. This information should be marked on your existing bulb. If by chance it is rubbed off or not shown, always check your fixture for the maximum wattage it can handle. This information is usually located within the fixture, often near the socket.

    Which circline bulb size do I need?

    Figure out the bulb size. In the case of circlines, you will need the diameter of the bulb. Diameter is a unit of measurement found by measuring from side to side through the center of the object. The most common sizes include T5, T9, and T6 – where the T stands for “tubular” and the number is a measurement in eighths of an inch. For example, a T5 is a tubular bulb that is 5/8” in diameter. Also, the number after "FC" usually determines the diameter so an FC12 is 12 inch in diameter.

    Which circline pin configuration do I need?

    It is especially important to take note of the pin configuration. The pins must be the same as the replacement bulb in order to fit back into the existing fixture. Not only will you need to know how many pins the bulb has, but where exactly on the lamp they are positioned.

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