Direct answer
Voltage tells you the circuit the bulb is designed for, while wattage tells you power consumption and helps estimate heat and brightness. Both values should be matched to the fixture or equipment requirement before replacement.
Comparison table
| Marking | Meaning | Buyer action |
|---|---|---|
| 12V | Designed for a 12 volt circuit | Match with 12V equipment or confirm by RFQ |
| 24V | Designed for a 24 volt circuit | Common in many equipment and vehicle systems |
| 5W | Consumes about 5 watts under rated conditions | Check heat, brightness and fixture rating |
| V range | May indicate a range or multiple available variants | Confirm exact required version before order |
How to identify
Look for voltage and wattage printed on glass, base or packaging.
Do not confuse volts with watts.
When several numbers appear in the product name, confirm which one is voltage and which one is wattage.
Check whether the replacement is intended for AC, DC or a specific driver.
Buyer checks
Send the original marking exactly as printed.
Provide the target equipment voltage.
Confirm acceptable wattage or brightness target.
Confirm by RFQ if the marking is incomplete or includes multiple variants.
Confirm by RFQ
AOTENG can quote by voltage and wattage, but the buyer should confirm equipment rating, fixture heat limits and approval requirements.
Common mistakes
Reading 12V3W as a model number instead of voltage and wattage.
Assuming the same base means the same wattage is acceptable.
Selecting a brighter lamp without checking heat limits.
FAQ
Which is more important, voltage or wattage?
Both matter. Voltage must match the circuit, and wattage affects load, heat and brightness.
Can I choose a higher wattage bulb?
Do not assume so. Higher wattage can create more heat or exceed fixture limits.
What if the old marking is unreadable?
Send photos, dimensions and equipment details, then Confirm by RFQ.
Sources and limits
- AOTENG product catalog - Product and specification reference
- AOTENG procurement support - RFQ and sourcing guidance
