Which bulb is brighter?

The Feit Electric LED, at 1,400 lumens versus 1,050 for the Philips fluorescent. That is about a third more light from a bulb that uses less power.

Will the Feit LED work in my existing fixture?

It uses the same G10Q 4-pin base and is sold as a 22-watt equivalent, so it fits the same socket as the Philips FC8T9. Check whether your fixture is ballast-dependent, since some LED circlines are designed for direct-wire or ballast-compatible setups.

The Feit LED is rated for 25,000 hours. Philips does not publish a lifespan for the FC8T9 here, but fluorescent tubes typically fall well short of that and lose brightness as they age.

Is the Philips worth choosing over the LED?

Only if you want to stay with fluorescent or value its much larger review base, 330 ratings at 4.3 versus 19 at 3.6. On efficiency and output, the Feit wins.

Do both give the same color of light?

Yes. Both are 4100K cool white, so the color should look the same in the room.

Philips FC8T9 22W T9 G10Q 4100K Cool White Circline Fluorescent Bulb vs Feit Electric 8 in. 15-Watt T9 Cool White 4100K G10Q Circline LED Light Bulb

The Feit Electric LED is the better buy for most shoppers: it uses 15 watts instead of 22, puts out 1,400 lumens instead of 1,050, and is rated for 25,000 hours. The Philips FC8T9 is the safer pick if you want to keep a true fluorescent tube in an existing fixture and prefer its stronger track record, 4.3 out of 5 from 330 ratings versus 3.6 from 19. No prices were given for either bulb, so compare current store prices on Deal.ai before deciding.

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