1. Product Overview
The Progress Lighting P8709-20 Dark Sky Shield is an accessory designed to reduce light pollution from exterior lanterns. It fits over the lamp to direct light downwards, preventing ambient light from scattering into the night sky. This shield is intended for use with exterior lanterns that feature a single, downward-facing medium base lamp.
Key Features:
- Antique Bronze finish
- Helps reduce light pollution from exterior fixtures
- Dimensions: 2-7/8 inches Diameter x 3-3/8 inches Height

2. Important Safety Information
WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Please check your local laws before purchasing and installing this product.
Always ensure power is disconnected at the circuit breaker before attempting any installation or maintenance. This product is designed for use with 120-volt electrical systems.
3. Product Specifications
| Specification | Detail |
|---|---|
| Brand | Progress Lighting |
| Model Name | Nightsaver |
| Part Number | P8709-20 |
| Color | Bronze / Dark (Antique Bronze) |
| Material | Aluminum |
| Style | Traditional |
| Room Type | Outdoor |
| Installation Type | Fit-over / Add-on |
| Light Source Type | Standard Light Bulb |
| Number of Light Sources | 1 (for single lamp fixtures) |
| Voltage | 120 Volts |
| Bulb Base Compatibility | E26 (Medium Base) |
| Item Weight | 3.2 ounces (0.2 Pounds) |
| Assembled Diameter | 2.88 Inches |
| Height | 3.38 Inches |
| Water Resistance Level | Water Resistant |
| Assembly Required | Yes |

4. Installation Instructions
This Dark Sky Shield is designed for a "fit-over" or "add-on" installation to existing exterior lanterns. It is compatible only with exterior lanterns that have a single medium base (E26 type) lamp facing downwards.
- Safety First: Before beginning installation, ensure the power supply to the outdoor lantern is turned off at the circuit breaker.
- Access Lamp Socket: Carefully open or remove any covers from your exterior lantern to access the lamp socket.
- Install Shield: Position the Dark Sky Shield over the existing medium base (E26) lamp socket. The shield is designed to clip onto the socket. Ensure the clips are securely fastened to prevent movement.
- Replace Lamp (if necessary): If you removed the lamp, reinsert it into the socket. Ensure the lamp is fully seated.
- Secure Lantern: Close or reattach any covers to your exterior lantern.
- Restore Power: Turn the power supply back on at the circuit breaker.

5. Operation
The Dark Sky Shield operates passively. Once installed, it functions by physically blocking upward and horizontal light emission from the lamp, directing it downwards. This reduces light spill and glare, contributing to a darker night sky and minimizing light trespass into adjacent areas.
6. Maintenance
The Dark Sky Shield requires minimal maintenance. Periodically inspect the shield for any accumulation of dirt, dust, or debris. Clean the exterior surface with a soft, damp cloth. Avoid using abrasive cleaners or solvents, as these may damage the finish. Ensure the shield remains securely attached to the lamp socket.
7. Troubleshooting
- Shield does not fit: Ensure your exterior lantern uses a single, downward-facing medium base (E26) lamp. This shield is not designed for spotlights or fixtures with multiple lamps or upward-facing lamps. Verify the dimensions of your lamp socket and the shield (2-7/8 inches diameter) for compatibility.
- Shield feels loose: Ensure the clips are properly engaged with the lamp socket. If the clips appear damaged or bent, the shield may not secure correctly.
- Light pollution not reduced: Confirm the shield is installed correctly and fully covers the light-emitting portion of the lamp from upward and horizontal angles. The effectiveness depends on the fixture design and lamp type.
8. Warranty and Support
This Progress Lighting P8709-20 Dark Sky Shield comes with a 1-year limited manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use.
For warranty claims or technical support, please contact Progress Lighting directly. Refer to the original product packaging or the official Progress Lighting website for current contact information.
Manufacturer: HI- Progress Lighting




