1. Introduction
Thank you for choosing Lepro GU10 LED Light Bulbs. These non-dimmable 4W LED bulbs are designed to replace 50W halogen bulbs, offering significant energy savings and a long lifespan. They provide a soft, comfortable 2700K warm light with a 100° flood beam, ideal for various indoor lighting applications.
This manual provides essential information for the safe and efficient use of your new LED bulbs, including installation, operation, maintenance, and troubleshooting.
2. Safety Information
Please read all safety instructions carefully before installation and use. Keep this manual for future reference.
- Electrical Safety: Always turn off the power at the circuit breaker or fuse box before installing, removing, or servicing the bulb.
- Non-Dimmable: These LED bulbs are NOT dimmable. Do not use them with dimmer switches, as this may cause flickering, damage to the bulb, or reduce its lifespan.
- Indoor Use Only: These bulbs are designed for indoor use in dry locations. Do not expose them to water or excessive moisture.
- Correct Base Type: Ensure the light fixture uses a GU10 base. Attempting to force the bulb into an incompatible socket can cause damage.
- Temperature: Do not install in totally enclosed fixtures that restrict airflow, as this can shorten bulb life.
- Disposal: Dispose of bulbs according to local regulations. Do not dispose of with general household waste.
3. Product Features
- Energy Efficient: 4W LED bulbs replace 50W halogen bulbs, saving up to 92% on electricity costs.
- Long Lifespan: Designed for over 15,000 hours of use, lasting 10 times longer than traditional halogen and incandescent bulbs.
- Warm White Light: Provides 2700K soft warm light with 350 lumens output, creating a comfortable ambiance.
- Wide Beam Angle: 100° flood beam for broad illumination, suitable for various applications.
- Easy Installation: Standard PAR16 shape with GU10 twist-and-lock base for simple replacement.
- Safe & Eco-Friendly: Mercury-free, no UV/IR radiation, ensuring safety for your family and the environment.
- Flicker-Free & Buzz-Free: Provides stable and quiet lighting.

Figure 3.1: Key specifications of the Lepro GU10 LED bulb, including its 100-degree beam angle, 4W power consumption, 350 lumens brightness, 2700K warm light color, and 15,000-hour lifespan.
4. Setup and Installation
These GU10 LED bulbs are designed for easy installation into standard GU10 lamp holders.
- Turn Off Power: Before beginning, ensure the power to the light fixture is completely turned off at the circuit breaker or fuse box.
- Remove Old Bulb: Allow the old bulb to cool down completely. Gently push the old GU10 bulb into its socket and twist counter-clockwise to unlock and remove it.
- Insert New Bulb: Align the two pins of the new Lepro GU10 LED bulb with the two holes in the lamp holder.
- Lock Bulb: Gently push the bulb into the socket and twist clockwise until it locks securely into place. Do not overtighten.
- Restore Power: Turn the power back on at the circuit breaker or fuse box.
- Test: Turn on the light switch to confirm the bulb is working correctly.

Figure 4.1: Illustration of the GU10 Twist-N-Lock base, showing its dimensions and explicitly stating that the bulb is non-dimmable. It also shows a comparison between a GU10 base (correct) and a GU5.3 base (incorrect).
5. Operating Instructions
Operating the Lepro GU10 LED Light Bulb is straightforward:
- Once installed, simply use your standard light switch to turn the bulb on or off.
- These bulbs provide instant full brightness without any warm-up time.
- As these are non-dimmable bulbs, they will operate at full brightness when powered on.

Figure 5.1: Examples of multi-scene applications for the GU10 LED bulbs, including tracking lights in a kitchen, ceiling lights in a bedroom, recessed lights in a living room, and accent lights on a wall.
6. Maintenance
Lepro GU10 LED bulbs require minimal maintenance due to their long lifespan and durable design.
- Cleaning: Ensure the power is off before cleaning. Use a soft, dry cloth to wipe the bulb. Do not use liquid cleaners or abrasive materials.
- Replacement: Replace the bulb only when it reaches the end of its operational life. Follow the installation steps in Section 4 for replacement.
- Storage: If storing bulbs, keep them in their original packaging in a cool, dry place to protect them from damage.
7. Troubleshooting
If you encounter issues with your Lepro GU10 LED bulbs, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Bulb does not light up. |
|
|
| Bulb flickers or buzzes. |
|
|
| Light is too dim. |
|
|
8. Specifications
| Attribute | Value |
|---|---|
| Brand | Lepro |
| Model Name | LE GU10 LED Light Bulbs |
| Light Type | LED |
| Special Feature | Non Dimmable |
| Wattage | 4 Watts |
| Bulb Shape Size | PAR16 |
| Bulb Base | GU10 |
| Incandescent Equivalent Wattage | 50 Watts |
| Specific Uses For Product | Indoor use only |
| Light Color | Warm White |
| Voltage | 120 Volts |
| Unit Count | 6.0 Count |
| Color Temperature | 2700 Kelvin |
| Brightness | 350 Lumen |
| Shape | Reflector(R) |
| Material | Aluminum, Glass |
| Connectivity Technology | Normal bulb |
| Indoor/Outdoor Usage | Indoor |
| Beam Angle | 100 Degrees |
| Average Life | 15000 Hours |
| Product Dimensions | 1.97"W x 2.09"H |
9. Warranty and Support
For warranty information and customer support, please refer to the official Lepro website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
You can also find additional information and support resources on the product's Amazon page: Product Page





