Will this fit my round ceiling light?

It fits fixtures that take an 8-inch circline tube with a G10Q 4-pin socket. Check the old tube's base and diameter before ordering.

Is 6500K too blue for a kitchen?

6500K is daylight white, cooler and bluer than the 3000K–4000K most homes use. It reads crisp in garages and utility rooms but can feel stark in living areas.

Does it work in any fixture?

No. It is a fluorescent tube and needs a fixture with a compatible ballast and G10Q socket. It is not a plug-and-play replacement for LED circline lamps.

How long does it last?

The rated life is over 12,000 hours, roughly several years of typical daily use. Output dims gradually toward the end of that life.

Should I buy this or an LED circline?

An LED circline uses less power and lasts longer but usually costs more and may need the ballast bypassed. This tube is the simpler swap if your fixture already works.

Where can I buy the 22 Watts 8 Inch Round T9 Fluorescent Circular Bulb?

15 stores we checked sell it, including Zoro, Stones Ace of, Action Industrial Supply Company, Amazon, Best Buy.

22 Watts 8 Inch Round T9 Fluorescent Circular Bulb

Best price now

$10.99at ZoroChecked 10 min ago

Prices are checked against each store and labelled with when.

Visit Zoro

22 Watts 8 Inch Round T9 Fluorescent Circular Bulb

Best price now

$10.99at ZoroChecked 10 min ago

Prices are checked against each store and labelled with when.

Visit Zoro

Ask our agent about this product

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Price facts

Lowest price today: $10.99 at Zoro (checked Nov 13, 2026).

Our take on the 22 Watts 8 Inch Round T9 Fluorescent Circular Bulb

This is a 22-watt T9 circline fluorescent tube that puts out 980 lumens of daylight-white 6500K light. It uses a G10Q 4-pin base and fits fixtures built for 8-inch round tubes, such as ceiling lights in kitchens, garages, basements and offices. Its rated life is over 12,000 hours. Against LED circline retrofits it is cheaper to buy but less efficient and needs a ballast-compatible fixture; against standard 3000K tubes the 6500K output is cooler and bluer, which some people find harsh in living spaces.

Best forReplacing a burnt-out 8-inch circline tubeKitchens, garages and basements needing bright white lightFixtures with a G10Q 4-pin socketBuyers who want to keep an existing fluorescent ballast

Pros

Bright 980-lumen output for its size
Daylight 6500K color suits task and utility areas
Long rated life of over 12,000 hours
Standard G10Q 4-pin base fits common circline fixtures
Simple drop-in replacement for an existing tube

Cons

6500K is cool and can look clinical in living rooms
Fluorescent tube needs a working ballast, unlike LED retrofits
Contains mercury, so disposal needs care
Less energy-efficient than LED circline alternatives

22 Watts 8 Inch Round T9 Fluorescent Circular Bulb prices at every store

ZoroNew
Availability unknown
$10.99Checked 10 min ago
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22 Watts 8 Inch Round T9 Fluorescent Circular Bulb price history

$24.99$4.00

Nov 1Nov 13

Lowest price we've seen: $4.00 on Nov 13 at Payless4Lighting; highest $24.99 on Nov 1. Tracked across 15 stores since Nov 1.

From Casa Home Living

22-watt T9 fluorescent circular bulb in daylight 6500K
980 lumens output
G10Q 4-pin base
Bright 6500K light for kitchens, garages, basements and general purpose ceiling lights
Lifespan of over 12,000 hours
8 inch nominal diameter; MOD 1.13 inches

Returns: 30-day hassle-free returns
Shipping: Free shipping on every order

About the 22 Watts 8 Inch Round T9 Fluorescent Circular Bulb

This is a 22-watt T9 fluorescent circular bulb with an 8 inch nominal diameter. It produces 980 lumens of daylight light at 6500K and fits fixtures that use a G10Q 4-pin base.

It is a general purpose bulb for kitchens, garages, basements and ceiling lights. Its rated lifespan is over 12,000 hours.

Model: FC8T9/D
Type: T9 fluorescent circular bulb
Wattage: 22 watts
Brightness: 980 lumens
Color temperature: Daylight, 6500K
Base: G10Q 4-pin
Diameter: 8 inch nominal
MOD: 1.13 inches
Lifespan: Over 12,000 hours
Use: Kitchens, garages, basements, general purpose ceiling lights

Specifications

Wattage: 22 watts
Brightness: 980 lumens

Questions and answers

Will this fit my round ceiling light?: It fits fixtures that take an 8-inch circline tube with a G10Q 4-pin socket. Check the old tube's base and diameter before ordering.
Is 6500K too blue for a kitchen?: 6500K is daylight white, cooler and bluer than the 3000K–4000K most homes use. It reads crisp in garages and utility rooms but can feel stark in living areas.
Does it work in any fixture?: No. It is a fluorescent tube and needs a fixture with a compatible ballast and G10Q socket. It is not a plug-and-play replacement for LED circline lamps.
How long does it last?: The rated life is over 12,000 hours, roughly several years of typical daily use. Output dims gradually toward the end of that life.
Should I buy this or an LED circline?: An LED circline uses less power and lasts longer but usually costs more and may need the ballast bypassed. This tube is the simpler swap if your fixture already works.
Where is the 22 Watts 8 Inch Round T9 Fluorescent Circular Bulb cheapest?: At Zoro, for $10.99, as of our latest check.
Where can I buy the 22 Watts 8 Inch Round T9 Fluorescent Circular Bulb?: 15 stores we checked sell it, including Zoro, Stones Ace of, Action Industrial Supply Company, Amazon, Best Buy.