Independent reference · not a sales listing
Westinghouse 0391500
Westinghouse R40 375 Watt Medium Base Incandescent Lamp
This is a 375-watt incandescent with a R40 envelope and E26 base. It produces 2,300 lumens. The listed light color is 2400 K warm white. No incandescent-equivalent claim is stored in the source snapshot.
View the official record ↗Source citation, not a buying link.Before replacing it
Five checks decide the fit
A shared base or wattage alone is not enough. Work down the list with the old bulb and fixture label in hand.
- 01
Socket
Match E26 exactly. The R40 code describes the bulb envelope, not the socket. Open the E26 base guide.
- 02
Electrical rating
The source lists 120 V. Confirm that against the fixture and local supply.
- 03
Brightness, not “watts”
Target about 2,300 lumens. The 375 W figure is input power, not brightness.
- 04
Physical clearance
The official maximum overall length is 6.5 inches. Check shade, cover, and neck clearance.
- 05
Heat, controls, and location
Enclosed-fixture use is not stated; dimming is not stated; a wet/damp rating is not stated.
Normalized specifications
What the label says
These values are transcribed and normalized from the official source. A blank claim stays “not stated”; it is never filled by assumption.
- Manufacturer
- Westinghouse
- SKU / model
- 0391500
- Technology
- INCANDESCENT
- Shape
- R40
- Base
- E26
- Voltage
- 120 V
- Input power
- 375 W
- Incandescent equivalent
- Not stated
- Light output
- 2,300 lumens
- Color temperature
- 2400 K
- CRI
- Not stated
- Dimmable
- Not stated
- Rated life
- 5,000 hours
- Beam angle
- Not stated
- Location rating
- Not stated
- Enclosed fixture
- Not stated
- Pack quantity
- 1
Useful next check
Nearby specification matches
Same E26 base and within 35% of 2,300 lumens. These are comparison leads, not confirmed substitutes.
250R40/1/HDRP
R40 · E26 · 250 W
2,400 lm 2400 KFeit Electric250R40/1
R40 · E26 · 250 W
2,200 lm 2700 KPhilips571497
A21 · E26 · 29 W
2,610 lm 2700/2200 KFeit Electric250R40/1/RP
BR40 · E26 · 250 W
2,200 lm 2700 KFeit ElectricOM50/150/5CCTCA
A19 · E26 · 23 W
2,200 lm 2700/3000/3500/4000/5000 KFeit ElectricPAR38DM/2200/5K/LED
PAR38 · E26 · 21 W
2,200 lm 5000 KRead the specification in context
Use the record, then check the system
The label describes this lamp. These guides help connect it to the socket, room, controls, and other models from the same manufacturer.
E26 · Medium screw
E26 is the standard medium screw base used by most household bulbs in the United States. Base and bulb shape are separate specifications.
Open reference →Color guide2700K vs 3000K vs 5000K
Understand how the listed color temperature changes the look of a room.
Read guide →Code guideWhat bulb letters and numbers mean
Separate shape codes, base codes, dimensions, and electrical ratings on the label.
Read guide →Manufacturer indexMore Westinghouse model records
Compare verified models from the same official catalog snapshot by SKU, base, shape, power, and output.
Browse brand →Quick answers
Questions about 0391500
What socket does Westinghouse 0391500 use?
The official record identifies a E26 base. The replacement socket must use the same base code; a similar-looking bulb shape does not establish socket compatibility.
Is Westinghouse 0391500 dimmable?
The source snapshot does not state a dimming rating. Treat dimmer compatibility as unconfirmed.
Can Westinghouse 0391500 be used in an enclosed fixture?
The source snapshot does not state an enclosed-fixture rating. Do not infer one from shape or wattage; confirm on the bulb or manufacturer page.
BulbMatch stores factual fields for independent label and compatibility research. It is not affiliated with the manufacturer and does not sell this product.