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

Product Overview

This adjustable UFO high bay operates at 250, 375, or 500 watts with corresponding lumen outputs of 38,700, 58,000, or 76,800. The wattage and color temperature settings are field-adjustable, allowing the fixture to be configured during or after installation without additional components.

The fixture delivers 155 lumens per watt across all output settings and is designed to replace 1500 to 2000 watt metal halide systems. It operates on 277-480V input at 50/60 Hz with a power factor of .95 and THD of 20%.

Color temperature options are 4000K and 5000K. The standard beam angle is 90 degrees through a polycarbonate lens. CRI is 80+. The housing is black aluminum alloy, and the fixture weighs 28 lbs with dimensions of 19 inches diameter by 17 inches height.

Where This Product Fits Best

This high bay is built for high-ceiling industrial and commercial spaces where metal halide systems are being phased out. The 277-480V input makes it appropriate for facilities with three-phase electrical infrastructure typical of manufacturing plants, warehouses, and distribution centers.

The IP65 rating allows installation in environments exposed to dust accumulation and water spray from cleaning operations or condensation. The IK08 rating supports use in areas where incidental contact from equipment or material handling could occur. Operating temperature range is -22°F to 122°F, covering cold storage entry zones, unconditioned warehouses, and facilities with significant process heat.

The 90-degree beam angle provides broad coverage suited to open floor layouts. Facilities with bay spacing that previously used 1500W to 2000W metal halide fixtures are the primary fit for this output class.

Performance and Functional Considerations

Output spans from 38,700 lumens at the 250W setting to 76,800 lumens at 500W. This range accommodates varying task requirements across different zones within the same facility or allows adjustment based on actual lighting needs observed after installation.

The 0-10V dimming input enables integration with building automation or manual dimming controls. The 10kV surge protection rating addresses transient voltage events common in industrial electrical environments.

Rated lifespan is 150,000 hours at L70, which defines the point at which output drops to 70% of initial lumens. This lifespan applies under operation within the stated temperature range.

Installation and Long-Term Use

The standard mounting method is an eye-hook, suitable for pendant or chain suspension. The fixture weighs 28 lbs, which should be accounted for when selecting suspension hardware and confirming structural capacity at the mounting point.

Wattage and color temperature are adjusted on the fixture itself, allowing configuration to match the space once ceiling height and reflectance conditions are observed. This also supports future adjustments if operational requirements change without requiring fixture replacement.

The aluminum alloy housing and IP65 rating support long-term durability in dusty or damp environments. Routine maintenance is limited to periodic lens cleaning where airborne particulates are present.

How This Fixture Is Commonly Used

Once installed, the adjustable wattage allows operators to dial in light levels based on observed conditions rather than pre-installation estimates. A fixture mounted at the same height as others in the facility can be tuned up or down to balance uniformity or address a specific task area.

The selectable color temperature is typically set based on the work being performed. 5000K is often chosen for inspection or detailed assembly tasks where color distinction matters. 4000K may be preferred for general warehousing or where a less stark appearance is acceptable.

Dimming via 0-10V allows the fixture to respond to occupancy controls, daylight harvesting systems, or manual reduction during low-activity periods. This is useful in facilities with variable shift coverage or spaces that cycle between active use and standby.

Safety, Certifications, and Warranty

This fixture is ETL listed and rebate eligible. These certifications are relevant when submitting for utility incentive programs or meeting facility compliance requirements.

We provide a 5-year warranty on this fixture.

Frequently Asked Questions

What voltage does this fixture require?
The fixture operates on 277-480V input. It is not compatible with 120V or 208V circuits.

Can I change the wattage after installation?
Yes. Wattage is field-adjustable between 250W, 375W, and 500W.

Is this fixture eligible for utility rebates?
The fixture is rebate eligible. Confirm specific program requirements with your utility provider.

What environments can this fixture be used in?
The IP65 rating supports use in dusty environments and areas subject to water spray. Operating temperature range is -22°F to 122°F.

What is the warranty coverage?
This fixture includes a 5-year warranty.

What color temperatures are available?
The fixture is adjustable between 4000K and 5000K.

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.