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320 Watt LED High Mast Light | 44800 Lumens | 5000K | 100V-277V or 277V-480V
Product Description
320 Watt high mast light has a die-cast aluminum housing and polyester paint finish with a 5,000-hour salt fog rating. Prismatic glass optics provide high application efficacy, uniformity, and glare control. Specialized high mast optics ensure wide distributions to maximize light distribution for multiple pole installation. 3G vibration rated. 3/5/7-pin photocell control available. The fixture has an adjustable angle mount 2 3/8' O.D. tenon. 4-bolt mounting and safety cables ensure the fixture is locked onto the pole.
Key Features
- Watts: 320
- Lumens: 44800
- Lumens Per Watt: 140
- Replaces: 1000 Watt Metal Halide
- Voltage: 100V-277V or 277V-480V
- Color Temperature: 4000K or 5000K
- CRI: 70+
- Dimming: 1-10V or Optional
- Beam Angles (Alt): Type 2,3,4,5
- Lifespan: 100,000 (L70) hours
- Mounting: Pole
- Frequency: 50-60Hz
- Power Factor: > .90
- THD: < 20%
Durable Construction
- Housing: Aluminum Alloy and PC Lens
- IP Rating: IP66
- IK Rating: IK08
- Surge Protection: 10 kVa or 20 kVa
- Certifications: UL | Rebate Eligible
Measurements
- Weight: 48 lbs
Features/Accessories
- Photocell
Product SKU Variations
- SKU: MLLG-HD-LED-HM-320-50
- Voltage: 100V-277V
- SKU: MLLG-HD-LED-HM-320-50-HV [T]
- Voltage: 277V-480V
Request IES Files
Web ID: 1546
Product Overview
This 320 Watt LED high mast light delivers 44,800 lumens at 5000K. It is designed for pole mounting in large outdoor or industrial spaces requiring high-output, wide-area illumination.
The fixture uses a die-cast aluminum housing with a polyester paint finish and a 5,000-hour salt fog rating. Prismatic glass optics provide uniform light distribution and glare control.
Specialized high mast optics are available in Type 2, 3, 4, and 5 beam patterns to support multiple pole layouts. The fixture is 3G vibration rated for use in environments with significant pole movement or vibration.
It supports both 100V-277V and 277V-480V input ranges and offers 1-10V dimming or optional dimming configurations. Photocell control is available with 3/5/7-pin compatibility.
Where This Product Fits Best
This fixture is suited for high mast lighting applications such as large parking lots, transportation terminals, ports, sports complexes, and industrial yards. It is intended to replace 1000 Watt metal halide systems.
The IP66 rating allows use in outdoor and harsh environments where exposure to dust, rain, or water jets is expected. The 5,000-hour salt fog rating supports installation in coastal or corrosive locations.
3G vibration rating makes this fixture appropriate for sites with wind-induced pole movement or vibration from nearby equipment. The adjustable angle mount and 2 3/8 in O.D. tenon accommodate standard pole installations.
Wide beam angle options and high lumen output make this fixture suitable for multi-pole layouts requiring broad, uniform coverage.
Performance and Functional Considerations
The fixture delivers 140 lumens per watt and a total output of 44,800 lumens. It operates at 320 Watts and is available in 5000K or 4000K color temperatures with a CRI of 70+.
Power factor is greater than 0.90 and total harmonic distortion is less than 20%. The fixture supports 50-60Hz operation and is compatible with both low and high voltage input ranges.
Surge protection is available in 10 kVa or 20 kVa options. The fixture is UL listed and rebate eligible.
The prismatic glass optics and specialized beam patterns allow for precise light placement and reduced glare in large area applications.
Installation and Long-Term Use
The fixture mounts to poles using an adjustable angle mount for a 2 3/8 in O.D. tenon. Four-bolt mounting and safety cables secure the fixture to the pole.
At 48 lbs, the fixture requires standard lifting and handling precautions during installation. The aluminum alloy housing and PC lens provide durability in outdoor environments.
IP66 rating protects against dust and high-pressure water jets. IK08 rating allows the fixture to withstand moderate impact from objects or debris.
The fixture is rated for 100,000 hours (L70) of operation, supporting long-term use with minimal maintenance. Photocell control is available for automated dusk-to-dawn operation.
How This Fixture Is Commonly Used
Once installed, this fixture provides consistent, high-output lighting for large outdoor areas. The wide beam options allow you to select the distribution pattern that matches your site layout and pole spacing.
Photocell control, when used, enables automatic on/off operation based on ambient light levels. Dimming capability can be used to adjust light levels as needed for site requirements or energy management.
The fixture?s construction and ratings allow it to remain in place through harsh weather, vibration, and exposure to salt or corrosive environments. Routine inspection of mounting hardware and safety cables is recommended for long-term reliability.
Operators can rely on uniform light output and minimal glare, supporting visibility and safety in high-traffic or critical outdoor areas.
Safety, Certifications, and Warranty
This fixture is UL listed and rebate eligible.
IP66 rating allows use in wet locations and protects against dust and water jets. IK08 rating allows the fixture to tolerate moderate impact.
3G vibration rating supports use on poles subject to wind or mechanical vibration. Surge protection is available in 10 kVa or 20 kVa options.
The fixture is rated for 100,000 hours (L70) of operation. Warranty terms are provided by LED Lighting Supply.
Frequently Asked Questions
What voltage ranges are supported?
This fixture operates on 100V-277V or 277V-480V input.
What is the lumen output?
The fixture delivers 44,800 lumens.
What environmental ratings does this fixture carry?
The fixture is rated IP66 and IK08, with a 5,000-hour salt fog rating and 3G vibration rating.
What mounting method is used?
The fixture mounts to a 2 3/8 in O.D. tenon with four-bolt mounting and safety cables.
Is this fixture UL listed and rebate eligible?
Yes, this fixture is UL listed and rebate eligible.
What is the rated lifespan?
The fixture is rated for 100,000 hours (L70).
Application Questions and Clarification
This product description reflects the provided specifications, ratings, and configuration options. For questions related to site-specific conditions, electrical compatibility, control integration, or application requirements not addressed in the provided data, our team is available to provide clarification.





