250 / 375 / 500 Watt Adjustable UFO High Bay | 38700 to 76800 Lumens | 4000K / 5000K | 277-480V
This UFO high bay fixture is a strong choice for large commercial and industrial spaces needing high-output, efficient lighting, such as warehouses, manufacturing plants, and distribution centers. Its selectable wattage (250/375/500W) and color temperature (4000K/5000K) allow adaptation to varied tasks and layouts, while the 90-degree beam angle and up to 76,800 lumens ensure broad, uniform coverage in high-ceiling areas. The IP65 and IK08 ratings support use in dusty, wet, or moderately demanding environments, and 10kV surge protection adds electrical reliability. Due to its size and weight, careful planning is needed for overhead mounting or retrofits.
Dwayne Kula | President, CTO and Founder
26 in stock
Product Specifications
Key Features
| Brand | LED Lighting Supply |
| Watts | 250 | 375 | 500 |
| Lumens | 38700 | 58000 | 76800 |
| Lumens Per Watt | 155 |
| Replaces | 1500 or 2000 Watt Metal Halide |
| Voltage | 277V-480V |
| Color Temperature | 4000K or 5000K |
| CRI | 80+ |
| Dimming | 0-10V |
| Beam Angles (Std) | 90° |
| Optics | Polycarbonate Lens |
| Lifespan | 150,000 (L70) hours |
| Mounting | Eye-Hook or Yoke |
| Fixture Color | Black |
| Frequency (Hz) | 50/60 |
| Power Factor | .95 |
| THD | 20% |
Durable Construction
| Housing | Aluminum Alloy |
| IP Rating | IP65 |
| IK Rating | IK08 |
| Surge Protection | 10kV |
| Operating Temperature | -22°F to 122°F |
| Certifications | ETL | Rebate Eligible |
| Warranty | 5 years |
Measurements
| Dimensions (in) | 19 W X 17 H |
| Weight (lbs) | 28 |
Features/Accessories
- Color Adjustable
- Wattage Adjustable
Download IES Files
Product Lighting Layout Estimator
Use this estimator to calculate approximate fixture count, spacing, and average foot-candles for a simple rectangular space using the selected LED fixture. Enter your room dimensions, mounting height, target foot-candles, light loss factor, and room/layout condition to generate a preliminary lighting layout. When IES photometry is available, workplane height and room reflectance controls are shown.
Project Inputs
Estimated Results
Estimated average foot-candles are preliminary and should be verified with a lighting plan for project-critical applications.
Room / Layout Condition: This field is used only when usable IES photometry is not available. In fallback mode, it acts as a simplified room utilization factor for reflectance, fixture distribution, racking, obstructions, and how much fixture light reaches the work area. Open / light-colored spaces use 0.90, typical warehouses or shops use 0.75, racked or obstructed spaces use 0.60, and dark or complex spaces use 0.45. When IES photometry is active, this field is hidden and the estimator uses the selected workplane height, LLF, and simplified reflectance adjustment instead.
Photometry / Simulation Note: When usable IES photometry is available for the selected fixture, this estimator uses the fixture’s IES candela data, selected workplane height, light loss factor, and simplified reflectance adjustment to estimate fixture count, average foot-candles, and visual light distribution. The reflectance adjustment is a conservative approximation and is not a full zonal-cavity, radiosity, or professional photometric room calculation. When IES photometry is not available, the estimator uses a simulated beam model based on lumens, mounting height, room/layout condition, light loss factor, and beam angle.
Preliminary Estimate Only: This estimator is intended for simple square or rectangular spaces and should be used as a planning aid, not a final photometric lighting plan. Actual light levels may vary based on fixture optics, selected IES file, mounting conditions, workplane height, ceiling height, surface reflectance, obstructions, controls, voltage, installation conditions, and site-specific requirements. Project-critical applications should be verified with a formal lighting plan.
This estimate is a starting point. Warehouses, industrial facilities, hazardous locations, sports areas, schools, healthcare spaces, public areas, and code-sensitive projects may require a reviewed lighting layout before purchase or installation.
Product Overview
This adjustable UFO high bay is a 277-480V fixture for high-ceiling warehouse lighting, manufacturing facility lighting, distribution center lighting, and gymnasium lighting. It provides selectable wattage and color temperature settings in a compact round housing.
The 250W, 375W, and 500W settings support projects replacing 1500W or 2000W metal halide fixtures. Eye-hook and yoke mounting support suspended and surface-mounted installation layouts.
Core Performance and Output
This fixture produces 38,700, 58,000, or 76,800 lumens at 155 lumens per watt. Available 4000K and 5000K settings allow the installed color temperature to match the facility lighting plan.
The standard 90 degree beam distribution provides a broad downward pattern. Higher output can reduce fixture count in larger layouts, while low mounting heights may create excessive brightness if the wattage setting is not matched to the space.
Operation is 277-480V, 50/60Hz, with 0-10V dimming capability. Power factor is 0.95 and total harmonic distortion is 20%.
Adjustability and Control Options
Wattage is adjustable between 250W, 375W, and 500W. Output changes with the selected wattage setting from 38,700 to 76,800 lumens.
Color temperature is adjustable between 4000K and 5000K. The fixture supports 0-10V dimming where a compatible dimming control system is provided.
Longevity and Reliability
Rated life is 150,000 hours L70. The fixture includes 10kV surge protection for electrical transient protection.
The operating temperature range is -22 degrees F to 122 degrees F. Long-term performance depends on maintaining suitable electrical connections, mounting integrity, and operating conditions within this range.
Build Quality and Physical Characteristics
The housing is aluminum alloy with a black finish. The fixture measures 19 inches wide by 17 inches high and weighs 28 pounds.
An IP65 rating and IK08 impact rating support installation where dust, moisture, and incidental impact exposure are present. A polycarbonate lens protects the optical assembly.
Where This Product Fits Best
This UFO high bay fits large indoor spaces requiring high output from a suspended or yoke-mounted fixture. Its 277-480V input and selectable 250W through 500W output align with larger commercial and industrial lighting systems.
- manufacturing facility lighting
- warehouse lighting
- distribution center lighting
- aircraft hangar lighting
- gymnasium lighting
- indoor sports facility lighting
The IP65 enclosure supports dusty or damp conditions within the rated operating temperature range. Fixture output, mounting height, and layout requirements should be reviewed before selecting the wattage setting.
Installation and Long-Term Use
The fixture installs using an eye-hook or yoke mount. The 28-pound fixture weight and selected mounting method should be accounted for in the supporting structure.
Installation requires a 277-480V electrical supply. For dimmed operation, the 0-10V control wiring must be included in the installation plan.
How This Fixture Is Commonly Used
In warehouse lighting, manufacturing facility lighting, and distribution center lighting layouts, fixtures are arranged in rows or grid patterns based on mounting height, target light levels, and aisle or work-area layout. Eye-hook mounting is commonly used where fixtures are suspended from existing structure.
In gymnasium lighting, aircraft hangar lighting, and indoor sports facility lighting, yoke mounting can support directional fixture positioning. Higher output settings can reduce fixture count, but fixture placement must control brightness and uniformity across the lighted area.
Safety, Certifications, and Warranty
This fixture is ETL listed and rebate eligible. It is rated IP65 and IK08.
The fixture includes a 5-year warranty. Installation and service should be completed with power disconnected and with the fixture supported during mounting.
Frequently Asked Questions
The following answers address the supplied fixture specifications and available configuration options.
Q: What wattage settings are available?
A: The fixture is adjustable to 250W, 375W, or 500W.
Q: What lumen output does this UFO high bay provide?
A: Output is 38,700 lumens at 250W, 58,000 lumens at 375W, and 76,800 lumens at 500W.
Q: Can the color temperature be changed?
A: Yes. The fixture has selectable 4000K and 5000K color temperature settings.
Q: What mounting options are available?
A: The fixture can be mounted with an eye-hook or yoke mount.
Q: Does this fixture support dimming?
A: Yes. It supports 0-10V dimming.
Q: What voltage does this fixture require?
A: The fixture operates on 277-480V.
Application Questions and Clarification
Application fit depends on the selected wattage, mounting method, electrical supply, and lighting layout requirements.
Q: Is this fixture appropriate for warehouse lighting and manufacturing facility lighting?
A: Warehouse lighting and manufacturing facility lighting are primary applications for this UFO high bay. Final fixture selection depends on mounting height, target light levels, and layout requirements.
Q: Can this fixture be used for gymnasium lighting?
A: Gymnasium lighting is a primary application. The 90 degree beam distribution, selected wattage, mounting height, and fixture placement affect the final layout.
Q: What should be reviewed for distribution center lighting layouts?
A: Distribution center lighting layouts should account for mounting height, target light levels, fixture spacing, selected wattage, and available 277-480V power.
Q: What should be considered for aircraft hangar lighting?
A: Aircraft hangar lighting is a secondary application. Mounting method, fixture position, selected wattage, and required light distribution should be established for the project.
Web ID: 2664
