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Comparing light fixture output

Posted by graywings (My Page) on
Mon, Apr 16, 12 at 9:43

Can anyone tell me whether a light fixture using
four GU24 13-watt fluorescent bulbs
will produce more light than a fixture using
one 22-watt bulb and one 32-watt T9 circline bulb?

Is it simple math?

Follow-Up Postings:

RE: Comparing light fixture output

Watts are not light output.

RE: Comparing light fixture output

OK. So how can I figure out the answer? Do I try to find out the lumens?

If I look up "13 Watt GU24 Base CFL Light Bulb" I can find one for sale that has an output of 950 lumens

I can find a 32 watt T-9 circline bulb with an output of 1950 lumens and a 22-watt t9 circline bulb with 675 lumens.


Is the answer to my question now:
4x950 = 3800 lumens
1950 lumens + 675 lumens = 2625?

Or do bulbs of the same size vary in light output?

RE: Comparing light fixture output

Lumens would be a better measure, but even that can be affected by fixture design.

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