Introduction
Thank you for choosing the SUN C4 Plus 256W LED UV Nail Lamp. This professional-grade nail lamp is designed for efficient and quick curing of various gel polishes, suitable for both manicure and pedicure applications. With its advanced features and user-friendly design, you can achieve salon-quality results at home or in a professional setting. Please read this manual carefully before use to ensure proper operation and maintenance.

Front view of the SUN C4 Plus 256W LED UV Nail Lamp.
Key Features
- High Power Output: 256W for fast and efficient curing.
- Dual Light Source: Equipped with 57 UV/LED beads (365nm + 405nm) suitable for curing all types of gel polishes.
- Multiple Timer Settings: Convenient 10s, 30s, 60s, and 99s (Low Heat Mode) timer options.
- Smart Infrared Sensor: Automatic activation when hands or feet are inserted, and deactivation when removed.
- Large LCD Display: Clear countdown timer for precise control.
- Convenient Handle Design: Easy to carry and transport.
- Removable Bottom Plate: Ideal for pedicures and simplifies cleaning.
- Overheating Protection: Ensures safe operation and extends product lifespan.
- Long-lasting LED Beads: Up to 50,000 hours of lifetime.

Top view of the SUN C4 Plus nail lamp, highlighting the control panel and LCD display.
Setup Instructions
- Unpack the Device: Carefully remove the nail lamp and all accessories from the packaging. Inspect for any damage.
- Connect Power Adapter: Insert the DC plug of the power adapter into the power input port at the back of the nail lamp. Plug the AC end of the adapter into a suitable electrical outlet. Ensure you use the correct plug type for your region (US or EU).


Ensure to use the correct power adapter for your region (US or EU).
- Attach Bottom Plate (if detached): If the bottom plate is not already attached, align the plate with the grooves on the main unit and slide it into place until it clicks securely. This plate is removable for pedicures and easy cleaning.
- Placement: Place the nail lamp on a stable, flat surface.
Operating Instructions
The SUN C4 Plus nail lamp offers various modes for optimal gel curing.
Power On/Off
The device powers on automatically when plugged into an electrical outlet. There is a small power switch on the back of the unit to completely turn it off if needed.
Using Timer Modes
The lamp features four preset timer buttons for different curing needs:
- 10s Button: Press for quick curing of thin gel layers.
- 30s Button: Press for standard curing time.
- 60s Button: Press for longer curing times, suitable for thicker gel layers or darker colors.
- 99s Button (Low Heat Mode): This mode gradually increases power over time to eliminate pain caused by curing gels, especially for sensitive nails.
Once a timer button is pressed, the lamp will start, and the LCD display will show the countdown. The lamp will automatically turn off when the timer expires.
Smart Infrared Sensor Operation
The nail lamp is equipped with an intelligent infrared sensor for hands-free operation:
- When no timer button is selected, simply place your hand or foot into the lamp. The infrared sensor will detect it, and the lamp will automatically turn on, starting a default curing time (usually 120 seconds or continuous until removed).
- When you remove your hand or foot, the lamp will automatically turn off.
- If a timer button was previously selected, inserting your hand/foot will activate the lamp for the selected duration.
Demonstration of the SUN C4 Plus nail lamp's timer modes and smart sensor functionality.

The removable bottom plate allows for easy cleaning and use for pedicures.
Maintenance
- Cleaning: Regularly wipe the surface of the lamp with a soft, dry cloth. For stubborn stains, a slightly damp cloth can be used, but ensure no liquid enters the device.
- Detachable Base: The bottom plate can be easily removed for thorough cleaning, especially after pedicure use. Simply slide it out, clean, and reattach.
- Storage: Store the nail lamp in a cool, dry place away from direct sunlight and moisture when not in use.
- Avoid Harsh Chemicals: Do not use abrasive cleaners, solvents, or harsh chemicals, as these can damage the lamp's finish and internal components.
- LED Care: The LED beads are designed for long life (up to 50,000 hours) and do not require replacement under normal use. Avoid touching them directly.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lamp does not turn on. | Power adapter not properly connected or no power from outlet. | Check if the power adapter is securely plugged into both the lamp and the wall outlet. Test the outlet with another device. |
| Gel polish is not curing properly. | Incorrect timer setting, gel applied too thick, or expired gel polish. | Ensure the correct timer setting is selected for your gel type. Apply thinner layers of gel. Check the expiration date of your gel polish. |
| Lamp automatically shuts off during use. | Overheating protection activated. | Allow the lamp to cool down for a few minutes before resuming use. Ensure proper ventilation around the device. |
| Smart sensor not working. | Obstruction near the sensor or sensor malfunction. | Ensure nothing is blocking the infrared sensor. If the issue persists, contact customer support. |
Specifications
| Attribute | Specification |
|---|---|
| Model | C4 Plus |
| Power | 256W |
| Lamp Beads | 57 PCS (UV/LED dual light source, 365nm + 405nm) |
| Power Source | Electric |
| Type | UV Lamps / Nail Dryer |
| Commodity Quality Certification | CE |
| Origin | Mainland China |
| Number of Pieces | One Unit |
| Timer Settings | 10s, 30s, 60s, 99s (Low Heat Mode) |
| LED Lifetime | Up to 50,000 hours |
| Package Dimensions (approx.) | Length: 25cm, Width: 20cm, Height: 15cm |
| Package Weight (approx.) | 0.64 kg |

Interior view showing the 57 LED beads and intelligent infrared sensors.
Warranty and Support
Your SUN C4 Plus LED UV Nail Lamp is backed by the seller's commitment to quality and customer satisfaction.
- Free Returns: Enjoy free returns within 90 days of purchase.
- Fast Delivery Guarantee: If delivery is delayed, you may be eligible for a $1.00 coupon code.
- Refund Policy: Refunds are available if the package is lost or items are damaged during transit. A full refund is also offered if no delivery occurs within 30 days.
- Customer Support: For any questions, concerns, or technical assistance, please contact the seller, BeautyDiary Store, directly through the platform where you made your purchase.
Please retain your proof of purchase for any warranty claims or support inquiries.





