Overall Diameter Overall Diameter |
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Base Type Base Type |
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![]() | Four Pin |
Wattage Wattage |
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Brightness Brightness |
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Light Appearance Light Appearance |
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Bulb Shape Number Bulb Shape Number |
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Bulb Shape Bulb Shape |
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![]() | Circline |
Light Technology Light Technology |
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Color Temperature Color Temperature |
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Trade Number Trade Number | Show |
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Trade Number Trade Number | Hide |
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Base Number Base Number |
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Beam Spread Beam Spread |
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![]() | Sphere |
Bulb Diameter Bulb Diameter |
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Bulb Material Bulb Material |
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Circline Bulb Style Circline Bulb Style |
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Color Rendering Index Color Rendering Index |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement) |
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Estimated Yearly Energy Cost Estimated Yearly Energy Cost |
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For Ballast Type For Ballast Type |
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Light Setting Light Setting |
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Maximum Temperature Maximum Temperature |
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Minimum Temperature Minimum Temperature |
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About Brightness
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About Light Appearance
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About Replacing Tubular Fluorescent Light Bulbs
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Circline Tubular Light Bulbs

Brightness is measured in lumens; the higher the lumens, the brighter the bulb. Color rendering index (CRI) is a measurement on a scale of 0-100 of how accurately the light from a bulb represents an object's true colors; the higher the number, the more natural the colors appear. Any CRI value over 80 will show colors true to life. Bulbs with a warm light appearance have yellow tones. Bulbs with a neutral light appearance are often used in workspaces. Bulbs with a cool light appearance have white/blue tones and are good for inspecting. A bulb’s estimated yearly cost is based on 3 hours of usage per day at $0.11 per kWh. They cannot be sold to Canada because they do not meet local efficiency standards and exceed local regulatory limits on mercury (for disposal information, visit www.epa.gov/cfl).
O'all Dia. | Equiv. Fluorescent Bulb Wattage | Light Appearance | Brightness, lumens | CRI | Light Setting | Bulb Material | Light Technology | Wattage | Rated Life, hrs. | Est. Yearly Energy Cost, $ | Trade No. | Pkg. Qty. | Cannot Be Sold To | Pkg. | |
T9 Bulb (1 1/8" Dia.) | |||||||||||||||
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16" | 40W | Cool (4,100K) | 2,500 | 60 | Dimmable | Glass | Fluorescent | 40W | 12,000 | 4.82 | FC16T9 | 1 | Canada | 0000000 | 000000 |