1. Introduction
Thank you for choosing the V-TAC PRO VT-211 LED E27 Bulb. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your new LED bulb. Please read these instructions carefully before use and retain them for future reference.

Figure 1: V-TAC PRO VT-211 LED E27 Bulb. This image displays the main product, a V-TAC PRO VT-211 LED bulb with an E27 screw base.
2. Safety Instructions
To ensure safe operation and prevent damage, please observe the following safety precautions:
- Always switch off the power supply before installing, replacing, or cleaning the bulb.
- Ensure the bulb is securely screwed into a compatible E27 lamp holder.
- Do not use the bulb in enclosed fixtures without adequate ventilation, as this may reduce its lifespan.
- Avoid touching the bulb immediately after use, as it may be hot.
- This bulb is designed for indoor use in dry conditions unless specified otherwise by the fixture.
- Do not disassemble or modify the bulb. There are no user-serviceable parts inside.
- Keep out of reach of children.
3. Setup and Installation
The V-TAC PRO VT-211 LED E27 Bulb is designed for simple installation into standard E27 lamp holders.
- Power Off: Before beginning installation, ensure the power supply to the light fixture is completely switched off at the main circuit breaker or wall switch.
- Remove Old Bulb (if applicable): If replacing an existing bulb, allow it to cool down completely before carefully unscrewing it counter-clockwise from the lamp holder.
- Install New Bulb: Gently screw the V-TAC PRO VT-211 LED E27 Bulb clockwise into the E27 lamp holder until it is finger-tight. Do not overtighten.
- Restore Power: Once the bulb is securely installed, restore power to the light fixture.

Figure 2: E27 Holder. This illustration highlights the E27 screw base of the V-TAC LED bulb, indicating its compatibility with standard fixtures.
4. Operating Instructions
Operating the V-TAC PRO VT-211 LED E27 Bulb is straightforward:
- Once installed and power is restored, simply use the standard wall switch or fixture switch to turn the light on or off.
- The bulb provides a natural white light at 4000K, suitable for various environments requiring clear and bright illumination.
- It features a wide 200-degree beam angle, ensuring broad light distribution.

Figure 3: 200-Degree Beam Angle. This visual representation illustrates the V-TAC LED bulb's wide 200-degree light distribution, ensuring broad coverage.
5. Maintenance
The V-TAC PRO VT-211 LED E27 Bulb requires minimal maintenance.
- Cleaning: Ensure the power is off and the bulb is cool before cleaning. Wipe the bulb gently with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- No User-Serviceable Parts: The bulb contains no user-serviceable parts. Attempting to open or repair the bulb will void the warranty and may pose a safety risk.
6. Troubleshooting
If the bulb does not function correctly, consider the following:
- No Light:
- Check if the power switch is in the 'ON' position.
- Ensure the bulb is screwed in tightly and making proper contact with the lamp holder.
- Verify that the power supply to the fixture is active (e.g., check circuit breaker).
- Test the bulb in another working fixture to rule out a faulty fixture.
- Flickering:
- Ensure the bulb is fully tightened.
- Check for loose wiring in the fixture or switch (consult a qualified electrician if unsure).
- This bulb is designed for non-dimmable circuits. Using it with a dimmer switch may cause flickering or damage.
If problems persist after performing these checks, please contact customer support.
7. Specifications
Detailed specifications for the V-TAC PRO VT-211 LED E27 Bulb:
| Feature | Specification |
|---|---|
| Brand | V-TAC |
| Model Number | 21178 |
| Light Type | LED (Samsung SMD Chip) |
| Bulb Base | E27 |
| Power Consumption | 10.5 Watts |
| Incandescent Equivalent | 75 Watts |
| Light Color | Natural White (4000K) |
| Voltage | 220-240 Volts (AC) |
| Beam Angle | 200 degrees |
| Product Dimensions (L x W x H) | 7 x 15 x 39 cm (Bulb: 110 mm height, 60 mm diameter) |
| Weight | 1 kilogram (package weight) |
| Material | Thermoplastic Bulb |

Figure 4: Dimensions Diagram. This technical diagram illustrates the bulb's height of 110 mm and diameter of 60 mm.
8. Warranty and Support
The V-TAC PRO VT-211 LED E27 Bulb comes with a warranty period of at least 2 years from the date of purchase, covering manufacturing defects and malfunctions under normal use.
For warranty claims, technical support, or any inquiries regarding your product, please contact your retailer or the V-TAC customer service department. Please have your proof of purchase and the product model number (21178) available when contacting support.
Spare parts availability is typically 1 year from the date of purchase.





