Independent reference · not a sales listing
Westinghouse 0391800
Westinghouse R40 125 Watt Medium Base Incandescent Lamp
Westinghouse lists this R40 E26 incandescent at 125 watts and 550 lumens. Its stated light color is 2400 K warm white. No incandescent-equivalent claim is stored for this model.
View the official record ↗Source citation, not a buying link.Before replacing it
Read these five fields before ordering
Use the old bulb and fixture label together. A shared base or wattage figure answers only part of the fit question.
- 01
Socket and shape
Match E26 exactly. The R40 code describes the bulb envelope, not the socket. Open the E26 base guide. Check the R40 shape profile.
- 02
Electrical rating
The source lists 120 V. Confirm that against the fixture and local supply.
- 03
Brightness, not “watts”
Target about 550 lumens. The 125 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 come from the cited manufacturer record. If that record omits a field, the table says “not stated” instead of supplying a likely value. See how the label fields differ.
- Manufacturer
- Westinghouse
- SKU / model
- 0391800
- Technology
- INCANDESCENT
- Shape
- R40
- Base
- E26
- Voltage
- 120 V
- Input power
- 125 W
- Incandescent equivalent
- Not stated
- Light output
- 550 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
For comparison
Records with the same base and similar output
Same E26 base and within 35% of 550 lumens. These are comparison leads, not confirmed substitutes.
G2560S2/5TSWF/HDRP
G25 · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KFeit ElectricSPIRAL5CCT/MB/HDRP
Specialty · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KFeit ElectricST60S2/5TSWF/HDRP
ST19 · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KFeit ElectricT1060/5TS/WF/HDRP/2
T10 · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KFeit ElectricT10L60S2/5TSWF/HDRP
T10 · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KFeit ElectricT10XL60S2/5TSWF/HDRP
T10 · E26 · 5.5 W
500 lm 2200/2700/3500/4000/5000 KRelated references
Put this model in context
The record describes one lamp. Use these guides for the socket, fixture, controls, and comparable records from the same manufacturer.
E26 · Medium screw
E26 is a medium Edison screw base with a nominal 26 mm thread diameter. In the United States, “standard” or “medium” base commonly means E26; bulb shape and voltage 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 0391800
What socket does Westinghouse 0391800 use?
Westinghouse lists this model with a E26 base. Look for the same complete base code on the socket or old lamp. The R40 shape is a separate specification.
Is Westinghouse 0391800 dimmable?
The source snapshot does not state a dimming rating. Treat dimmer compatibility as unconfirmed.
Can Westinghouse 0391800 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.