Independent reference · not a sales listing
Westinghouse 0478700
Westinghouse MR16 25 Watt GU10 Base Halogen Lamp.
This is a 25-watt halogen with a MR16 envelope and GU10 base. It produces 140 lumens. The listed light color is 3050 K neutral 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 GU10 exactly. The MR16 code describes the bulb envelope, not the socket. Open the GU10 base guide.
- 02
Electrical rating
The source lists 120 V. Confirm that against the fixture and local supply.
- 03
Brightness, not “watts”
Target about 140 lumens. The 25 W figure is input power, not brightness.
- 04
Physical clearance
The official maximum overall length is 2 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
- 0478700
- Technology
- HALOGEN
- Shape
- MR16
- Base
- GU10
- Voltage
- 120 V
- Input power
- 25 W
- Incandescent equivalent
- Not stated
- Light output
- 140 lumens
- Color temperature
- 3050 K
- CRI
- Not stated
- Dimmable
- Not stated
- Rated life
- 2,000 hours
- Beam angle
- 30°
- Location rating
- Not stated
- Enclosed fixture
- Not stated
- Pack quantity
- 1
Useful next check
Nearby specification matches
Same GU10 base and within 35% of 140 lumens. These are comparison leads, not confirmed substitutes.
Read 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.
GU10 · Twist-and-lock
GU10 uses two short pins with widened ends. Insert the bulb and rotate it to lock; the 10 refers to the nominal spacing between pin centers.
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 0478700
What socket does Westinghouse 0478700 use?
The official record identifies a GU10 base. The replacement socket must use the same base code; a similar-looking bulb shape does not establish socket compatibility.
Is Westinghouse 0478700 dimmable?
The source snapshot does not state a dimming rating. Treat dimmer compatibility as unconfirmed.
Can Westinghouse 0478700 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.