The current bulb that came with the fixture is a Hanstar FCL-22W Daylight, is this the correct replacement bulb?

Yes, Tommy, that's the correct replacement bulb. The only difference is your original FCL-22W is a Daylight bulb, and the Philips 391169 is Cool White Plus bulb. It will work, but there will be a slight difference in the color of the two bulbs, the Philips 391169 being 'Daylight' and the Hanstar FCL-22W being 'Cool White'.

My bulb says fc8 t9/kb, is this the correct replacement?

kB means kitchen and bath, so a different color temperature. But it will plug and play.

how do I test it on the work bench

An interesting question. Unless you have a transformer that produces the correct voltage and amperage, you can’t. However generally speaking, the rate of defective fluorescent bulbs from the factory is very, very low. If your old bulb stopped working and the new one doesn’t either, I would suggest buying a new ballast. They’re cheap and easy to replace and are likely to solve your problem.

DO I measure the inches on the outside or inside of the bulb?

The measurements are not a big issue with circular bulbs. Always go by the item number on bulb & 100% of the time it will be the bulb you want. The measurements are not accurate whether inside or outside, they will vary!!

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💡 Illuminate smarter, work brighter — the eco-chic choice for your space!

360 BEAM ANGLE - Uniform light distribution ensures no dark corners in your workspace or home.
LONG LASTING GLOW - Up to 12,000 hours of reliable illumination keeps your space lit and your replacements minimal.
ECO SMART EFFICIENCY - Consumes just 22 watts while delivering 1050 lumens, saving energy without sacrificing brightness.
WORK MODE BRIGHTNESS - 4100K cool white light creates a focused, productive environment perfect for garages and workshops.
SUSTAINABLY ENGINEERED - Philips’ low-mercury technology and recycled materials reduce environmental impact without compromising performance.

The Philips 391169 Circline Fluorescent 22-Watt T9 bulb delivers bright, cool white light at 4100K ideal for workspaces like garages and basements. With energy-efficient 22W power consumption, a long 12,000-hour lifespan, and Philips’ pioneering low-mercury technology using recycled materials, it combines performance with sustainability. Its 360-degree beam angle ensures even lighting, making it a smart, eco-conscious upgrade for professional and home environments alike.

Specifications

Brand	Philips LED
Light Type	Fluorescent
Special Feature	Energy Efficient
Wattage	22 watts
Bulb Shape Size	T
Incandescent Equivalent Wattage	60 Watts
Specific Uses For Product	Lamp
Light Color	Cool White
Voltage	120 Volts
Unit Count	1.0 Count
Color Temperature	4100 Kelvin
Number of Items	1
Brightness	1000
Shape	T9
Material	Glass
Connectivity Technology	Normal bulb
Indoor/Outdoor Usage	Indoor
Controller Type	Push Button
Power Source	AC
Color Rendering Index	62
Beam Angle	360 Degrees
Power Consumption	22 Watts
Item Package Quantity	1
Light Source Type	Fluorescent
Specification Met	Cool White (4100 K)
Item Weight	0.1 Pounds
Light Source Wattage	22 Watts
Product Dimensions	8"W x 1.03"H
Accepted voltage frequency	100 to 120 Volts and 60 Hertz
Control Method	App
Average Life	12000 Hours
White Brightness	1050 Lumens
Efficiency	High
Global Trade Identification Number	00046677391164
Manufacturer	Philips Lighting
UPC	046677391164 885630792965 046677254490
Part Number	046677391164
Item Weight	1.6 ounces
Item model number	391169
Is Discontinued By Manufacturer	No
Size	1 Count (Pack of 1)
Color	Cool White
Finish	Opaque
Special Features	Energy Efficient
Batteries Included?	No
Batteries Required?	No

€ 36.91

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Philips 391169 Circline Fluorescent 22-Watt 8-Inch T9 Cool White Light Bulb

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