T10, W5W and 194 are often grouped in replacement catalogs, yet a matching wedge interface is only the first fitment check. For wholesale purchasing, confirm the full bulb envelope, socket and vehicle application.
Technical diagram: wedge-bulb fitment checks
Original inspection schematic: socket opening → wedge width/thickness → bulb body diameter → total installed length → available housing depth → light distribution. Measure against the original lamp and the intended vehicle; do not assume every LED design sharing a T10 designation has the same overall dimensions.
Common purchasing mistakes
- Ordering by the T10 label without checking housing clearance.
- Assuming all models work on both 12 V and 24 V.
- Ignoring LED polarity, dashboard monitoring or vehicle-specific electrical behavior.
- Using an interior-light product in an exterior signal application without checking color, output and local rules.
Model and application verification
Request a dimensional drawing, rated voltage range, LED configuration, color option and packaging specification for the exact SKU. LEDVEDA offers T10/W5W/194 families, but a universal electrical or vehicle fitment claim is not appropriate. Consult the T10/W5W/194 product guide, voltage sourcing guide and sample approval checklist.
Dimensional worksheet for T10 sourcing
Ask the supplier to provide measured overall length, maximum body width, wedge insertion width and thickness, and the location of emitting surfaces. Record all dimensions in millimeters with the exact product revision. LED boards, protective lenses and heat-spreading housings can exceed the envelope of a glass wedge bulb even when the electrical interface is similar.
Photograph the original socket and the lamp installed in the housing. Confirm the wedge contacts grip securely without bending or intermittent connection. Some LED variants are polarity-sensitive; test both installation orientations only where the design and socket permit it safely.
Electrical and application matrix
- Specify nominal vehicle voltage and the bulb’s actual rated input range.
- Define interior, position, license plate or other intended function rather than writing only T10.
- Confirm color, direction of light output and housing clearance.
- Check for dashboard bulb-out warnings, flicker or unintended glow in the target vehicle.
- Record the exact sample SKU and packaging code for repeat purchases.
A CANBUS marketing label is not proof of universal compatibility; a load resistor may also introduce heat and electrical demand. Where warning cancellation matters, test on the actual vehicle and document the result. Consult the quality inspection checklist before ordering production quantities.
LEDVEDA T10 product and dimension photos
Existing LEDVEDA media assets. Dimensions in the size illustration apply to the pictured SKU, not every T10 bulb.
T10 W5W 194 buyer verification matrix
| Check | Buyer should confirm |
|---|---|
| Socket | Wedge fit, contact position and insertion depth |
| Physical clearance | Overall length, body width and lens or housing clearance |
| Power supply | 12 V or 24 V rating for the exact SKU; polarity where applicable |
| Lighting function | Interior, license plate, position or instrument lighting and suitable light distribution |
| Vehicle electronics | Check warning messages, dimming behavior and any claimed CANBUS compatibility on the target vehicle |
| Purchase order | Sample part number, color, packaging, voltage and agreed dimensions |
Important: W5W and 194 naming overlap in many catalogs, but this does not guarantee that every LED replacement fits every vehicle.
FAQ
Are T10, W5W and 194 always interchangeable?
No. The names frequently overlap, but dimensions, rated power, light output and vehicle-specific requirements can differ.
Will a T10 LED work in a 24 V truck?
Only if that exact product is rated for the required operating range.
What should importers test first?
Mechanical fit, voltage, polarity, light distribution and dashboard behavior in the intended application.
Ask for a T10 wholesale sample
Send your original bulb photo, socket measurements, voltage, color and quantity via the LEDVEDA wholesale RFQ form. For private-label packaging, see our packaging guide.