250 / 375 / 500 Watt Adjustable UFO High Bay | 38700 to 76800 Lumens | 4000K / 5000K | 277-480V

Product Overview

This is a wattage and color adjustable UFO LED high bay designed for large-scale, high-ceiling commercial and industrial interiors. The fixture supports selectable outputs of 250, 375, or 500 watts, delivering up to 76,800 lumens at either 4000K or 5000K CCT. It operates on 277-480V circuits and is suitable for mounting heights typically found in warehouses, manufacturing plants, and distribution centers. The fixture is engineered as a direct replacement for 1500W and 2000W metal halide high bays, providing a robust solution for demanding environments.

Commonly installed using an eye-hook or yoke mount, this UFO high bay is built for rapid deployment and long-term reliability in high-activity spaces. The fixture?s IP65 and IK08 ratings support use in areas exposed to dust, moisture, and moderate impact.

Core Performance and Output

This fixture offers selectable output levels of 38,700, 58,000, or 76,800 lumens, with a system efficacy of 155 lumens per watt. The 90° beam angle provides broad, uniform coverage suitable for open floor layouts and high racking. 0-10V dimming is standard for integration with lighting controls or occupancy sensors. Power factor is 0.95, and THD is 20%.

At maximum output, this fixture is intended for mounting heights from 30 to 60 feet. Excessive output may cause glare or over-lighting at lower mounting heights. Uniformity may decrease if spacing exceeds recommended patterns for the selected wattage and ceiling height.

Adjustability and Control Options

Wattage can be field-selected between 250W, 375W, and 500W to match required light levels or energy targets. Color temperature is adjustable between 4000K and 5000K. 0-10V dimming is included for basic control integration. The fixture supports both eye-hook and yoke mounting for flexibility in installation.

No advanced controls or wireless options are integrated. All adjustments are made at the fixture during installation or maintenance.

Longevity and Reliability

The fixture is rated for 150,000 hours (L70) and includes a 5-year warranty. The aluminum alloy housing and polycarbonate lens provide resistance to corrosion and impact. Surge protection is rated at 10kV for electrical reliability in industrial environments.

Operating temperature range is -22°F to 122°F. The fixture is suitable for continuous operation in unconditioned spaces and is designed for minimal maintenance over its service life.

Build Quality and Physical Characteristics

The fixture measures 19 inches wide by 17 inches high and weighs 28 pounds. The housing is constructed from aluminum alloy with a black finish. The lens is polycarbonate for impact resistance and optical clarity. The fixture is IP65 rated for dust and water ingress and IK08 rated for impact resistance.

Mounting options include eye-hook and yoke, both supporting secure attachment to structural ceiling members or trusses. The fixture is designed for overhead installation in open or racked environments.

Where This Product Fits Best

This UFO high bay is intended for large, high-ceiling indoor environments requiring high-output, uniform illumination. It is suitable for both open and racked layouts where mounting heights range from 30 to 60 feet. The fixture is commonly deployed in:

• manufacturing facility lighting
• warehouse lighting
• distribution center lighting
• aircraft hangar lighting
• indoor sports facility lighting
• basketball court lighting
• convention center lighting
• event facility lighting

Environmental characteristics include resistance to dust, moisture, and moderate impact. The fixture is suitable for use in locations with wide temperature swings and where periodic cleaning is required.

Installation and Long-Term Use

Installation is typically performed using the supplied eye-hook or yoke mount. The fixture?s weight and size require secure attachment to structural supports. 277-480V input allows direct connection to common industrial power systems. All adjustments for wattage and color temperature are made at the fixture prior to energizing.

Routine maintenance is limited to periodic cleaning of the lens and inspection of mounting hardware. No lamp or ballast replacements are required. The fixture is designed for long-term, low-maintenance operation in demanding environments.

How This Fixture Is Commonly Used

This fixture is most often installed at mounting heights between 30 and 60 feet, spaced to achieve uniform light levels across open floors or between racking. Typical layouts use wider spacing at higher wattage settings, with fixture count determined by target footcandle levels and ceiling height. In sports and event facilities, fixtures are positioned to minimize glare and shadowing.

Spacing and layout patterns vary based on selected wattage and application. Higher output settings reduce fixture count but may increase glare if not properly shielded or aimed.

Safety, Certifications, and Warranty

This fixture is ETL listed and rebate eligible. It is rated IP65 for dust and water ingress and IK08 for impact resistance. Surge protection is rated at 10kV. The product includes a 5-year warranty covering manufacturing defects and performance.

No additional safety certifications are required for standard industrial or commercial use. The fixture is suitable for use in locations where ETL listing and IP65/IK08 ratings are specified.

Frequently Asked Questions

Q: What is the recommended mounting height for this fixture?

A: Recommended mounting height is 30 to 60 feet, depending on selected wattage and target light levels.

Q: How is wattage and color temperature adjusted?

A: Both wattage and color temperature are set at the fixture using onboard switches before energizing the unit.

Q: What mounting options are available?

A: The fixture supports both eye-hook and yoke mounting for attachment to ceiling structure or trusses.

Q: Is this fixture compatible with lighting controls?

A: 0-10V dimming is standard and can be integrated with compatible control systems or occupancy sensors.

Q: How should fixture spacing be determined for uniform coverage?

A: Spacing depends on mounting height, selected wattage, and required light levels. Typical layouts use wider spacing at higher wattages and mounting heights.

Application Questions and Clarification

Q: Is this fixture suitable for use in natatoriums or swimming pool areas?

A: The fixture is IP65 rated but does not include additional corrosion protection for chlorinated environments. Evaluate site conditions before use in natatoriums.

Q: Can this fixture be used for basketball court lighting?

A: Yes, this fixture is commonly specified for basketball court lighting in indoor sports facilities with high ceilings.

Q: Is this fixture appropriate for aircraft hangar lighting?

A: The high output and wide beam angle make this fixture suitable for aircraft hangar lighting at appropriate mounting heights.

Q: Does the fixture require any special maintenance?

A: Routine maintenance is limited to cleaning the lens and checking mounting hardware. No lamp or ballast replacements are needed.