LED linear high bay with frosted lens for wide distribution in high-ceiling spaces; 120–277V input, 0–10V dimming, 135/175/215W options (20,900–30,600 lumens) with 4000K/5000K and 80+ CRI.

LED Linear High Bay 135W / 175W / 215W 20900 thru 30600 Lumens 4K / 5K 80+ CRI 0-10V Dimmable Frosted Lens 120-277V


Used in warehouses and distribution centers requiring selectable output from a single linear high bay platform. This Keystone Technologies LED linear high bay supports multiple wattage options with dimming for layout flexibility. It operates on 120–277V systems.


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Technical Specifications & Performance Data

Brand Keystone Technologies
Wattage 135W, 175W, 215W
Voltage 120–277V
Lumens 20,900 – 30,600
Lamp Type LED
CCT 4000K, 5000K
CRI 80+
Dimming 0–10V
Certifications cULus Listed, DLC Premium Listed
Minimum Operating Temperature -40°F
Location Rating Damp Location
Finish White
Dimensions 24.8" L × 11.81" W × 1.89" H
Warranty 5-Year Warranty

Visual Product Overview & Application Context

Technical FAQ Deep-Dive

What wattage and lumen output options are available for this LED linear high bay?

The Keystone LED Linear High Bay is available in three wattage options: 135W, 175W, and 215W. The lumen outputs for each wattage are as follows:

  • 135W: Up to 20,900 lumens
  • 175W: Up to 26,500 lumens
  • 215W: Up to 30,600 lumens

These fixtures provide high lumen output with up to 142 lumens per watt, ensuring efficient lighting for large industrial and commercial spaces. The fixture is designed to meet IES RP-7-20 (Industrial Lighting) standards, providing consistent horizontal illuminance and uniformity for warehouse and factory environments.

What color temperatures are available for this fixture?

This fixture offers selectable color temperatures of 4000K and 5000K, providing flexibility for various lighting needs. The 80+ CRI ensures accurate color rendering for tasks requiring good visibility and material handling in industrial settings.

What certifications and environmental ratings does this fixture have?

This high bay light fixture meets the following certifications and environmental ratings:

  • cULus Listed: Complies with North American safety standards for electrical components and fire hazards.
  • DLC Premium Listed: Eligible for utility rebate programs, contributing to energy savings and ensuring compliance with ASHRAE 90.1-2022 for energy-efficient lighting in commercial settings.
  • Damp Location Rated: Suitable for use in environments exposed to moisture, such as warehouses, factories, and indoor industrial spaces where wet conditions may occur.
  • UL 1598 Certified: Certified for safe operation in indoor environments, ensuring reliability and safety for both industrial and commercial applications.

What is the minimum operating temperature for this fixture?

This fixture operates in environments as low as -40°F (-40°C), making it suitable for cold storage areas, outdoor environments, and other harsh conditions that may be encountered in industrial and commercial settings.

What is the uniformity ratio, and how does it apply to warehouse lighting?

This fixture maintains a uniformity ratio (Emax/Emin) of 3:1 or 4:1, as required by 2026 Code Enforcement for warehouse and industrial lighting layouts. This ensures even horizontal illuminance and prevents poorly lit areas ("black holes") in compliance with IES RP-7-20 for industrial lighting standards.

What are the dimensions and mounting options for this fixture?

The physical specifications for this LED high bay are as follows:

  • Dimensions: 24.8" Length × 11.81" Width × 1.89" Height

Equipped with a frosted lens, this fixture ensures uniform light diffusion while minimizing glare. It is designed for ceiling or suspension mounting, making it ideal for large, open spaces such as warehouses, factories, and gymnasiums. It is also compatible with SmartPort technology for Plug-and-Play sensor integration, ensuring compliance with IECC 2024 and ASHRAE 90.1-2022 lighting control standards.

What is the rated life and warranty for this fixture?

This fixture is rated for 50,000 hours of operation, reducing the need for frequent replacements and minimizing maintenance costs. It is covered by a 5-year warranty, providing assurance of its performance and reliability in demanding environments.

What dimming and sensor integration options are available for this fixture?

In addition to 0-10V dimming, this fixture is compatible with SmartPort technology, allowing Plug-and-Play integration with occupancy sensors, daylight harvesting systems, and other lighting controls. This feature is in compliance with IECC 2024 and ASHRAE 90.1-2022 for lighting control systems in industrial and commercial applications.


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