Introduction
This manual provides essential information for the safe and effective use of your OttLite B181S3 18-watt VS T5 Linear Replacement Tube. This specialized fluorescent tube is designed to deliver optimal brightness and contrast, enhancing visibility for reading and detailed tasks. It is engineered to provide comfortable clarity and true color rendition, helping to reduce eyestrain. Please read these instructions carefully before installation and retain them for future reference.
Safety Information
- Electrical Safety: Always disconnect power to the fixture before installing or replacing the bulb. Failure to do so may result in electric shock or injury.
- Handling: Handle the fluorescent tube by its ends to avoid touching the glass directly. Oils from your skin can create hot spots and reduce bulb life.
- Compatibility: This tube is specifically designed as a replacement for compatible OttLite fixtures. Ensure the wattage and type (T5) match your fixture's requirements. Using an incompatible bulb may damage the fixture or the bulb itself.
- Disposal: Fluorescent bulbs contain small amounts of mercury. Dispose of used bulbs according to local regulations for hazardous waste. Do not dispose of in regular household trash.
- Breakage: In case of bulb breakage, ventilate the area and carefully clean up glass fragments using gloves. Avoid direct contact with broken glass and mercury.
Package Contents
- 1 x OttLite B181S3 18-watt VS T5 Linear Replacement Tube
Setup and Installation
- Power Disconnection: Ensure the lamp or fixture is unplugged from the electrical outlet or the circuit breaker is turned off before beginning installation.
- Remove Old Bulb: If replacing an existing bulb, carefully rotate the old fluorescent tube approximately 90 degrees until the pins at each end disengage from the lamp holders. Gently pull the tube straight out from the fixture.
- Insert New Bulb: Align the pins of the new OttLite B181S3 replacement tube with the slots in the lamp holders at each end of the fixture.
- Secure Bulb: Gently push the tube into the lamp holders until the pins are fully seated, then rotate the tube approximately 90 degrees until it locks into place. Ensure the tube is securely seated and cannot easily fall out.
- Restore Power: Plug the lamp back into the electrical outlet or turn the circuit breaker back on.
- Test: Turn on the lamp to verify the new bulb is functioning correctly.

Image of the OttLite B181S3 18-watt VS T5 Linear Replacement Tube, a tubular fluorescent bulb.
Operation
The OttLite B181S3 18-watt VS T5 Linear Replacement Tube provides specialized 508 Illumination, which is designed to mimic natural daylight. This light quality offers a balanced spectrum that helps to render colors accurately and reduce glare, making it ideal for tasks requiring visual precision such as crafting, reading, and detailed work. The 18-watt tube is energy-efficient, providing light output comparable to a 75-watt incandescent bulb while consuming significantly less energy.
Maintenance
- Cleaning: To clean the bulb, ensure the lamp is unplugged and the bulb is cool. Gently wipe the tube with a soft, dry, lint-free cloth. Do not use liquid cleaners or abrasive materials, as these can damage the bulb's surface.
- Longevity: The tube is rated to last up to 10,000 hours under normal operating conditions. Frequent switching on and off may slightly reduce its lifespan.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bulb does not light up. |
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| Bulb flickers. |
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Specifications
- Model Number: B181S3
- Wattage: 18 watts
- Bulb Type: T5 Linear Fluorescent
- Light Source Type: Incandescent (Note: While technically fluorescent, the product description sometimes uses 'incandescent' for general light type classification.)
- Operating Life: Up to 10,000 hours
- Voltage: 120 Volts (for compatible fixtures)
- Color Rendering Index (CRI): 80
- Shape: Tubular (T)
- Item Weight: 0.07 Kilograms
- UPC: 733353805687, 761712102634, 074748362478
Warranty and Support
The OttLite B181S3 18-watt VS T5 Linear Replacement Tube typically comes with a 1-year warranty for the bulb itself, as part of a larger fixture warranty. For specific warranty details, please refer to the documentation provided with your original OttLite lamp fixture. For technical support or further assistance, please contact OttLite customer service through their official website or the retailer where the product was purchased.