320 / 400 / 500 Watt Adjustable Linear LED High Bay Light | 48960 to 76900 Lumens | 3500K / 4000K / 5000K Adjustable | 100-277V | 3 Foot 4 Inches

Product Overview

This 320/400/500 watt adjustable linear LED high bay measures 39.5 inches long by 12 inches wide by 2 inches deep and weighs 14.6 pounds. The fixture delivers 48,960 to 76,900 lumens depending on the wattage setting, maintaining 150 lumens per watt across all output levels. It replaces 1500 watt metal halide fixtures.

Wattage and color temperature are field-adjustable. Wattage options are 320, 400, or 500 watts. Color temperature options are 3500K, 4000K, or 5000K. The fixture operates on 100-277V input at 50/60 Hz with a power factor of 0.90 and THD of 20% maximum.

Construction is aluminum alloy housing in a white finish. The standard beam angle is 120 degrees with a CRI of 80+. Rated lifespan is 100,000 hours at L70.

Where This Product Fits Best

This linear high bay is sized for spaces currently served by 1500 watt metal halide systems. The 76,900 lumen maximum output at 500 watts addresses high-ceiling applications where substantial light levels are required. The 48,960 lumen minimum at 320 watts allows the same fixture to serve areas where full output would be excessive.

The 100-277V input range covers standard commercial and industrial voltage systems without requiring transformers or voltage-specific models. Operating temperature range of -22°F to 122°F supports both climate-controlled interiors and spaces with temperature extremes from loading dock activity or process heat.

At 39.5 inches long, this fixture works in layouts where linear distribution patterns are preferred over concentrated point sources. The 120-degree beam angle provides broad coverage appropriate for open floor plans.

Performance and Functional Considerations

The three wattage settings allow output adjustment based on actual site conditions after installation. If a space ends up brighter than needed at 500 watts, stepping down to 400 or 320 watts reduces energy consumption while maintaining appropriate light levels. This adjustment happens at the fixture without replacing components.

Color temperature selection between 3500K, 4000K, and 5000K addresses different visual requirements. Warmer 3500K suits spaces where softer light appearance is preferred. Cooler 5000K provides higher visual contrast for task-intensive environments. This is also a field-adjustable setting.

The fixture supports 1-10V dimming for integration with building automation or manual dimming systems. This is separate from the wattage selection and provides continuous output adjustment within the selected wattage level.

Installation and Long-Term Use

Standard mounting uses chain or cable suspension. Surface mounting is also supported. The fixture ships without a power cord, so field wiring is required. Weight is 14.6 pounds, which factors into mounting hardware selection and structural attachment.

The aluminum alloy housing supports the rated operating range of -22°F to 122°F. This range accommodates seasonal temperature swings in non-climate-controlled spaces and sustained heat exposure in facilities with elevated ambient temperatures.

Rated lifespan of 100,000 hours at L70 means the fixture is expected to maintain at least 70% of initial output at that hour mark under normal operating conditions.

How This Fixture Is Commonly Used

Facilities replacing aging metal halide systems use this fixture to match or exceed existing light levels while reducing energy draw. The 1500 watt metal halide replacement rating provides a reference point for one-to-one swap planning in spaces where existing fixture locations will be reused.

The wattage and color temperature adjustments are typically set during commissioning and left in place. In spaces where needs change, such as a warehouse reconfigured for different racking layouts, these settings can be revisited without replacing the fixture.

The 1-10V dimming interface connects to standard building management systems or standalone dimmers. This allows scheduled dimming, occupancy-based control through external sensors, or manual adjustment from wall stations.

Safety, Certifications, and Warranty

This fixture is UL listed and rebate eligible. We provide a 5-year warranty.

Frequently Asked Questions

What wattage options are available?
The fixture is adjustable to 320, 400, or 500 watts.

What is the lumen output at each wattage?
Output is 48,960 lumens at 320 watts, 61,200 lumens at 400 watts, and 76,900 lumens at 500 watts.

What voltage does this fixture require?
It operates on 100-277V input.

Is this fixture eligible for utility rebates?
Yes, the fixture is rebate eligible.

What color temperatures are available?
The fixture is adjustable to 3500K, 4000K, or 5000K.

What mounting options are supported?
Chain or cable suspension is standard. Surface mounting is also supported.

What is the warranty period?
We provide a 5-year warranty on this fixture.

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.