Introduction
This manual provides essential information for the safe and effective installation, operation, and maintenance of your Venture 72315 MP400W/BU/ED28/UVS/PS/EM/950 400 Watt Metal Halide Light Bulb. Please read these instructions thoroughly before installation and retain them for future reference.
The Venture 72315 is a 400-watt metal halide lamp designed for high-intensity discharge (HID) lighting applications, offering a 5000K color temperature for clear illumination.
Safety Information
WARNING: Risk of electric shock and burns. Always disconnect power before installation, removal, or servicing. Allow the bulb to cool completely before handling.
- Ensure the fixture is rated for the bulb's wattage (400W) and type (Metal Halide).
- Use only with appropriate ballast and ignitor designed for 400W metal halide lamps.
- Do not operate with a damaged outer envelope. If the outer envelope is broken, immediately turn off the power and replace the bulb.
- Avoid direct eye exposure to the operating lamp.
- Dispose of bulbs according to local regulations, as they may contain mercury.
- This bulb is designed for enclosed fixtures only, unless specified otherwise by the fixture manufacturer.
Setup and Installation
- Power Disconnection: Ensure the power supply to the fixture is completely turned off at the circuit breaker before beginning installation.
- Fixture Compatibility: Verify that the lighting fixture is designed for 400-watt metal halide lamps and has a Mogul Screw (EX39) base.
- Unpacking: Carefully remove the bulb from its packaging. Avoid touching the glass envelope with bare hands, as oils can reduce bulb life. If touched, clean with a soft, lint-free cloth.
- Installation: Screw the bulb firmly into the lamp holder until it is snug. Do not overtighten.
- Power Connection: Once the bulb is securely installed, restore power to the fixture.

Image: Venture 72315 400 Watt Metal Halide Light Bulb. This image shows the clear ED28 shaped bulb with its Mogul Screw base.
Operating Instructions
- Initial Start-up: Metal halide lamps require a warm-up period to reach full brightness and color stability. This typically takes several minutes.
- Restrike Time: If the lamp is turned off, it requires a cool-down period before it can be restarted. Attempting to restart a hot lamp immediately will prevent it from igniting. Allow 5-15 minutes for the lamp to cool before attempting to restart.
- Normal Operation: Once warmed up, the bulb will provide consistent high-intensity illumination.
Maintenance
- Cleaning: Periodically clean the outer surface of the bulb and fixture reflector with a soft, dry, lint-free cloth to maintain optimal light output. Ensure power is off and the bulb is cool before cleaning.
- Replacement: Replace the bulb when it reaches the end of its rated life, or if it shows signs of flickering, dimming, or failure to ignite consistently. Always replace with a bulb of the same type and wattage.
- Disposal: Metal halide lamps contain small amounts of mercury. Dispose of spent lamps according to local, state, and federal regulations. Recycling options may be available in your area.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bulb does not light up. | No power to fixture, incorrect bulb installation, faulty ballast/ignitor, or end of bulb life. | Check power supply. Ensure bulb is screwed in correctly. Test with a known good bulb or check ballast/ignitor. Replace bulb if at end of life. |
| Bulb cycles on and off. | End of bulb life (cycling), incorrect ballast, or high ambient temperature. | Replace bulb. Verify ballast compatibility. Ensure adequate ventilation around the fixture. |
| Bulb takes a long time to warm up or restart. | Normal operation for HID lamps, or bulb nearing end of life. | This is typical. If warm-up/restart times become excessively long, consider replacing the bulb. |
Specifications
| Feature | Detail |
|---|---|
| Brand | Venture |
| Model Number | 72315 (MP400W/BU/ED28/UVS/PS/EM/950) |
| Light Type | Metal Halide |
| Wattage | 400 Watts |
| Bulb Shape Size | ED28 |
| Bulb Base | Mogul Screw (EX39) |
| Color Temperature | 5000 Kelvin |
| Finish | Clear |
| Material | Metal |
| UPC | 090444723153 |
Warranty and Support
For warranty information or technical support regarding your Venture 72315 Metal Halide Light Bulb, please refer to the documentation provided with your purchase or contact Venture Lighting directly through their official website or customer service channels.





