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Old 01-19-2010, 04:42 PM  
tractng
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Default BR30 and BR40 light bulbs

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Can I use BR40 in a BR30 fixture as long as the wattage is under the manufacturer recommended? It just fits nicer .

tony



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Old 01-20-2010, 06:53 PM  
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BR40 in a BR30 fixture as long as the wattage is under the manufacturer recommended? It just fits nicer .
If the glass bulb size is the same so you get the same amount of free air circulation within the fixture, and the lamp base is in the same base-up or base-down configuration, I can't imagine a reason why you can't.
Of course, UL and the manuf. has the final word on this.


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Old 01-23-2010, 03:28 PM  
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If the glass bulb size is the same so you get the same amount of free air circulation within the fixture, and the lamp base is in the same base-up or base-down configuration, I can't imagine a reason why you can't.
Of course, UL and the manuf. has the final word on this.
Thanks. The guy at home depot says I can but what do those guys know

tony
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Old 01-23-2010, 06:10 PM  
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Thanks. The guy at home depot says I can but what do those guys know

tony
And their bias is in the direction of selling you more bulbs.

The 40 is 30% larger in diameter than the 30; how much room is left in the fixture?
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Old 02-10-2010, 02:34 PM  
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Hello,


Can I use BR40 in a BR30 fixture as long as the wattage is under the manufacturer recommended? It just fits nicer .

tony
I have been in the lighting market for 30+ yrs

a BR40 bulb is 40/8ths of an inch wide

a BR30 is 30/8ths of an inch wide

so now you know how bulbs are measured

a F40T12 is 40 watts and 12/8ths of an inch wide
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Old 02-10-2010, 02:53 PM  
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I have been in the lighting market for 30+ yrs
Why don't they publish the lux levels for bulbs? It's the reason for buying a bulb.
I had to e-mail the manufacturers to get lux levels for a two-tube troffer and a 75w halogen flood [1800 lux at 5'].
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Old 02-15-2010, 05:45 PM  
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And their bias is in the direction of selling you more bulbs.

The 40 is 30% larger in diameter than the 30; how much room is left in the fixture?
Good amount of room. They even have a display of the br40 on the same fixture

tony
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Old 02-15-2010, 06:25 PM  
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Good amount of room. They even have a display of the br40 on the same fixture

tony
I guess it'll work but if the bulb life is significantly shorter than expected you might try the smaller bulb.


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