1. Introduction
Thank you for choosing SANSI LED Light Bulbs. This manual provides essential information for the safe and efficient use of your SANSI A21 (6000 Lumens) and A19 (3000 Lumens) LED bulbs. These bulbs are designed for superior energy efficiency, flicker-free operation, and long lifespan, utilizing SANSI's patented ceramic technology.
Please read this manual thoroughly before installation and retain it for future reference.
2. Safety Information
- Ensure power is turned off before installation or removal.
- Do not use with dimmers unless explicitly stated as dimmable (these models are not specified as dimmable).
- Suitable for indoor use only.
- Do not disassemble the bulb.
- Avoid direct exposure to water or high humidity.
- Operate within the specified voltage range (AC 100-132V).
3. Product Features
- Energy Efficient: Up to 90% energy savings compared to incandescent bulbs.
- Flicker-Free: Provides a stable light source for a comfortable environment.
- Patented Ceramic Technology: Enhances heat dissipation and product reliability for longer lifespan.
- Warm White Light (3000K): Ideal for creating a cozy and inviting atmosphere.
- High Brightness: A21 bulb delivers 6000 lumens, A19 bulb delivers 3000 lumens.
- Durable Construction: Flame retardant V0 grade ceramic material, WF2 anti-corrosion grade.

Image: Patented Ceramic Technology. This diagram illustrates how SANSI's ceramic technology improves heat dissipation and bulb longevity by directly soldering LED chips to a ceramic heat sink, contrasting it with less efficient traditional designs.

Image: Flicker-Free Design. This image compares the visual comfort of a room lit by a SANSI flicker-free LED bulb against one with a flickering bulb, highlighting the potential for eye fatigue and headaches from flickering light.
4. Installation and Setup
These LED bulbs are designed for easy installation into standard E26 sockets.
- Turn off Power: Before replacing any light bulb, ensure the power to the fixture is turned off at the switch and, if necessary, at the circuit breaker.
- Remove Old Bulb: Allow the old bulb to cool completely before carefully unscrewing it from the socket.
- Install New Bulb: Gently screw the SANSI LED bulb into the E26 socket until it is snug. Do not overtighten.
- Restore Power: Turn the power back on at the switch and circuit breaker.
Important Note: The SANSI A19 bulb is wider than a standard A19 light bulb. Please check your lampshade size before purchasing or installing to ensure proper fit.

Image: Wider A19 Bulb. This image displays the dimensions of the SANSI A19 bulb compared to a standard A19 bulb, indicating its wider profile.

Image: SANSI A21 Bulb Dimensions and Certifications. This image provides the physical dimensions of the SANSI A21 LED bulb and highlights its ETL and RoHS certifications, along with a 5-year warranty.
5. Operating Instructions
Once installed, operating your SANSI LED bulbs is straightforward.
- Power On/Off: Use the standard wall switch connected to the light fixture to turn the bulb on or off.
- Light Output: The A21 bulb provides 6000 lumens of 3000K soft warm white light. The A19 bulb provides 3000 lumens of 3000K soft warm white light.
- Control Method: The product specifications mention "App" as a control method, however, these specific bulbs are not advertised as smart bulbs. Please refer to the product packaging or specific model details for app compatibility if applicable. For standard operation, use a wall switch.

Image: Application Scenarios. This collage illustrates the versatility of SANSI LED bulbs, showing them effectively illuminating various indoor spaces including living areas, bedrooms, and workspaces.
6. Maintenance
SANSI LED bulbs require minimal maintenance due to their long lifespan and durable design.
- Cleaning: Ensure the power is off and the bulb is cool before cleaning. Wipe the bulb with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Replacement: With an estimated lifespan of 22.5 years (based on 3 hours/day), frequent replacement is not necessary. When replacement is needed, follow the installation steps in Section 4.
7. Troubleshooting
If you encounter issues with your SANSI LED bulb, refer to the following common troubleshooting steps:
- Bulb Not Lighting:
- Check if the power switch is on.
- Ensure the bulb is screwed in securely into the socket.
- Test the bulb in another working fixture to confirm it is not faulty.
- Check the circuit breaker for the fixture.
- Flickering:
- Ensure the bulb is not connected to a dimmer switch, as these bulbs are not specified for dimming.
- Verify the bulb is receiving stable voltage (AC 100-132V).
- Ensure the bulb is screwed in tightly.
- Reduced Brightness:
- Confirm the bulb is clean and free of dust or debris.
- Ensure the bulb is operating within its specified voltage range.
If problems persist after following these steps, please contact SANSI customer support.
8. Specifications
Below are the technical specifications for the SANSI A21 and A19 LED Light Bulbs.
| Feature | SANSI A21 LED Bulb | SANSI A19 LED Bulb |
|---|---|---|
| Brand | SANSI | |
| Light Type | LED | |
| Special Feature | Energy Efficient | |
| Wattage | 40 Watts (Equivalent to 400W Incandescent) | 20 Watts (Equivalent to 200W Incandescent) |
| Bulb Shape Size | A21 | A19 |
| Bulb Base | E26 | |
| Color Temperature | 3000 Kelvin (Soft Warm White) | |
| Brightness | 6000 Lumens | 3000 Lumens |
| Material | Ceramic | |
| Indoor/Outdoor Usage | Indoor | |
| Accepted Voltage Frequency | 100 to 132 Volts, 60 Hertz | |
| Lifespan | 22.5 years (based on 3 hours/day usage) | |
| Certifications | ETL Listed, RoHS Compliant | |


Image: Lighting Facts for A21 (6000 Lumens) and A19 (3000 Lumens) Bulbs. These labels provide detailed energy and light output information for both bulb types.
9. Warranty and Support
SANSI LED Light Bulbs come with a 5-Year Service Assistance warranty, ensuring quality and reliability.
- Warranty Coverage: This warranty covers defects in materials and workmanship under normal use.
- Lifespan: The bulbs are designed for an extended lifespan of approximately 22.5 years based on 3 hours of daily use.
- Contact Support: For warranty claims, technical assistance, or any questions regarding your SANSI product, please visit the official SANSI store or contact their customer service.





