Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Best Pro Lighting 150W Low Voltage Landscape Lighting Transformer, Model BPL-150W-BLK. Please read this manual thoroughly before installation and retain it for future reference. This transformer is designed for both indoor and outdoor low voltage landscape lighting applications.
Safety Information
WARNING: Risk of Fire or Electric Shock.
- Always disconnect power at the circuit breaker before installing or servicing.
- Installation involves running wiring through a building structure. Special wiring methods are required. Consult a qualified electrician for proper installation to avoid fire hazards.
- Do not immerse the transformer in water.
- Ensure the total wattage of connected bulbs does not exceed 150 watts.
- This transformer is suitable for outdoor use.
- Not for use with dimmers.
- Use only with low voltage landscape lighting fixtures.
- The unit is equipped with a push-button circuit breaker for overload protection. To reset, press the button down.

Image: Back of the transformer displaying input/output details and a critical warning about wiring through building structures, advising consultation with a qualified electrician.
Product Features
- 150W capacity for low voltage landscape lighting.
- Integrated photocell sensor for automatic dusk-to-dawn operation.
- Built-in timer with multiple settings (ON, OFF, AUTO, 4H, 6H, 8H).
- Durable black plastic case, suitable for indoor and outdoor use.
- Push-button circuit breaker for overload protection.
- UL Listed for safety and quality assurance.

Image: Front view of the transformer, highlighting its compact design and the integrated control panel for timer and photocell settings.
Setup and Installation
- Mounting: Select a suitable location for mounting the transformer. It should be mounted vertically on a wall or post, at least 1 foot above the ground, using appropriate screws (not included). Ensure the location is accessible and protected from direct water spray if possible, even though it is weatherproof.
- Wiring Connection:
- Ensure the transformer is unplugged from the power outlet.
- Open the terminal cover.
- Connect the low voltage landscape lighting wires to the terminal block inside the transformer. Ensure a secure connection for each wire. The transformer provides 12VAC output.
- Close the terminal cover securely.

Image: Detailed view of the low voltage wiring terminals, illustrating where landscape lighting wires should be connected.
- Power Connection: Plug the transformer's power cord into a standard 120V AC outdoor-rated grounded electrical outlet.
Operating Instructions
The transformer features a photocell sensor and a timer dial for controlling your landscape lighting.

Image: Control panel with the photocell and timer dial, indicating various operational modes.
- Timer Dial Settings:
- ON: Lights will remain on continuously.
- OFF: Lights will remain off.
- AUTO: Lights will turn on at dusk and turn off at dawn, controlled by the photocell sensor.
- 4H (4 Hours): Lights will turn on at dusk and automatically turn off after 4 hours.
- 6H (6 Hours): Lights will turn on at dusk and automatically turn off after 6 hours.
- 8H (8 Hours): Lights will turn on at dusk and automatically turn off after 8 hours.
- Photocell Sensor: The photocell detects ambient light levels. For optimal performance, ensure the photocell is not obstructed by objects or direct artificial light sources at night.
- Indoor Use: When used indoors or in dark locations, the plug-in timer can be used to override the photocell for continuous ON/OFF control.
Maintenance
- Periodically inspect the transformer and wiring for any signs of damage, wear, or loose connections.
- Keep the photocell sensor clean and free from dirt or debris to ensure accurate dusk-to-dawn operation.
- Clean the exterior of the transformer with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the total wattage of connected fixtures does not exceed the transformer's maximum capacity of 150 watts.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Lights do not turn on. |
|
|
| Lights stay on continuously. |
|
|
| Lights flicker or are dim. |
|
|
Specifications
| Model Number | BPL-150W-BLK |
| Input Voltage | 120V AC, 60Hz |
| Output Voltage | 12V AC, 12.5A |
| Maximum Wattage | 150W |
| Dimensions (L x W x H) | 6.25 x 4.25 x 3.75 inches |
| Weight | 7 Pounds |
| Certifications | UL Listed |
| Mounting Type | Wall Mount |
| Features | Photocell Sensor, Timer, Push Button Circuit Breaker |
Warranty Information
This Best Pro Lighting transformer comes with a Lifetime Warranty. For warranty claims or further details, please contact Best Pro Lighting customer support.

Image: Lifetime Warranty badge, emphasizing product durability and manufacturer commitment.
Customer Support
For technical assistance, troubleshooting, or warranty inquiries, please contact Best Pro Lighting customer support through their official channels. Refer to your purchase documentation or the Best Pro Lighting website for current contact information.




