Will this fit my fixture?

It fits fixtures that take a 4-pin circline tube, the FC8T9 type. Check your socket before buying, because 2-pin circline fixtures use a different bulb.

Is it as bright as an LED circline?

It produces about 1,000 to 1,050 lumens, similar to many LED circline replacements. LEDs use less power for the same light and usually last longer.

How long does it last?

Philips rates it at about 12,000 hours, roughly four years at three hours a day. Actual life depends on how often it is switched on and the fixture.

What color is the light?

It is cool white, a crisp, slightly bluish white. That suits garages, workshops and basements better than warm living areas.

Does it contain mercury?

Yes, it is fluorescent and contains a reduced amount of mercury. Recycle it at a hazardous-waste drop-off rather than putting it in household trash.

Can I use it in a cold garage?

It will work, but fluorescent tubes can be dimmer and slower to reach full output in cold temperatures. An LED retrofit handles cold better.

Where can I buy the 22-Watt Cool White Circline Tube Fluorescent Light Bulb?

14 stores we checked sell it, including M&M True Value Hardware, Kelton's Hardware & Pet, Centre Millwork, Spence Hardware & Supply, Country True Value.