Independent reference · not a sales listing
Westinghouse 0621800
Westinghouse T3 35 Watt G4 Base Halogen Xenon Lamp
This is a 35-watt halogen with a T3 envelope and G4 base. It produces 550 lumens. The listed light color is 2900 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 G4 exactly. The T3 code describes the bulb envelope, not the socket. Open the G4 base guide.
- 02
Electrical rating
The source lists 12 V. Confirm that against the fixture and local supply.
- 03
Brightness, not “watts”
Target about 550 lumens. The 35 W figure is input power, not brightness.
- 04
Physical clearance
The official maximum overall length is 1.19 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
- 0621800
- Technology
- HALOGEN
- Shape
- T3
- Base
- G4
- Voltage
- 12 V
- Input power
- 35 W
- Incandescent equivalent
- Not stated
- Light output
- 550 lumens
- Color temperature
- 2900 K
- CRI
- Not stated
- Dimmable
- Not stated
- Rated life
- 10,000 hours
- Beam angle
- Not stated
- Location rating
- Not stated
- Enclosed fixture
- Not stated
- Pack quantity
- 1
Useful next check
Nearby specification matches
Same G4 base and within 35% of 550 lumens. These are comparison leads, not confirmed substitutes.
No nearby verified records are available in the current snapshot.
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.
G4 · Straight bi-pin
G4 is a tiny straight bi-pin base with 4 mm between pin centers. Many G4 fixtures are low-voltage and have very limited space.
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 0621800
What socket does Westinghouse 0621800 use?
The official record identifies a G4 base. The replacement socket must use the same base code; a similar-looking bulb shape does not establish socket compatibility.
Is Westinghouse 0621800 dimmable?
The source snapshot does not state a dimming rating. Treat dimmer compatibility as unconfirmed.
Can Westinghouse 0621800 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.