The GLT HBUL-350W Series is an ultra-high-output, heavy-duty UFO LED high bay engineered for the largest industrial and commercial facilities requiring maximum lumen performance with field-adjustable flexibility. Four selectable wattage steps (140W / 210W / 280W / 350W — 40% / 60% / 80% / 100%) are adjustable on-site via the wattage adjustment dial. Fixed 5000K daylight CCT delivers crisp, high-contrast illumination optimized for industrial and warehouse environments. Delivers up to 62,000 lumens at a peak efficacy of 190 lm/W. Available in 120–277V and 347–480V to match any facility's distribution system. CRI 70, UL cUL wet location listed, DLC Premium listed, and rated life 100,000 hours. 0–10V dimmable driver standard (10% minimum). Backed by a 5-year limited manufacturer warranty.

Voltage Selection Guide

• 120–277V (Standard): For U.S. commercial and industrial facilities with standard voltage distribution. SKU: HBUL-350W-UV-50K-D10
• 347–480V (High Voltage): For Canadian facilities (347V) and large U.S. industrial plants (480V) with high-voltage distribution panels. Eliminates step-down transformers. SKU: HBUL-350W-UV-50K-D10 (HV)

Key Features — Both Voltage Variants

• Field-Selectable Wattage: 140W / 210W / 280W / 350W (40% / 60% / 80% / 100%) via on-site wattage adjustment dial
• Fixed CCT: 5000K Daylight — optimized for industrial visibility and contrast
• Maximum Lumen Output: 62,000 lm at 350W
• Peak Efficacy: 190 lm/W at 140W
• CRI: 70 across all wattage settings
• Dimming: 0–10V dimmable driver standard (100% to 10% minimum)
• Voltage Options: 120–277V or 347–480V — select at time of order
• Location Rating: UL cUL wet location listed — both variants
• Max Ambient Temperature: Up to 65°C at 40%/60%/80% settings; 55°C at 100% (350W)
• Cold-Start Rated: -40°C (-40°F)
• Optics: 120° lens for uniform light distribution
• Rated Life: 100,000 hours (IES LM-80 / TM-21)
• Certifications: DLC Premium, UL cUL Listed, TAA Compliant — both variants
• Wattage Equivalency: Replaces 750W–1000W metal halide UFO high bay fixtures
• Warranty: 5-year limited manufacturer warranty

Performance & Light Output

Fixed 5000K CCT across all wattage settings — identical output for both voltage variants. At 350W (100%): 62,000 lm / 177 lm/W | Max ambient: 55°C. At 280W (80%): 51,000 lm / 182 lm/W | Max ambient: 65°C. At 210W (60%): 39,000 lm / 186 lm/W | Max ambient: 65°C. At 140W (40%): 26,600 lm / 190 lm/W | Max ambient: 65°C. Rated life 100,000 hours per IES LM-80 results and TM-21 projections.

Smart & Control Features

Both voltage variants share the same plug-and-play sensor platform via the integrated sensor receptacle:

• Plug-and-Play PIR Sensor: MSANT12VPH01 (standard) | MSANT12VPHB01 (Bluetooth) — sold separately
• Plug-and-Play Microwave Sensor: MSANT12VMH01 (standard) | MSANT12VMHB01 (Bluetooth) — sold separately

Bluetooth variants enable wireless group control and scheduling without a separate gateway for large facility deployments. One sensor SKU covers both voltage variants.

Electrical

Available in 120–277V AC or 347–480V AC. 0–10V dimming from 100% to 10% minimum. Integrated surge protection. Operating temperature: -40°C to +55°C at 100% wattage; -40°C to +65°C at 80% and below. The 347–480V variant eliminates the need for step-down transformers in high-voltage facilities. TAA compliant.

Construction

Durable die-cast aluminum housing with heat-dissipating fins for superior thermal management. Dark bronze polyester powder-coat finish. 120° lens for uniform light distribution. Dimensions: Ø24.25" × 7.47"H (Ø616mm × 189.7mm). Weight: 17.32 lbs (350W variant).

Installation & Mounting

Hook mount pre-installed on both variants. 3/4" conduit pendant mount also supported. Recommended ceiling height by wattage setting: 140W — 20–28 ft | 210W — 25–35 ft | 280W — 30–40 ft | 350W — 35–45 ft.

• Sensors: MSANT12VPH01 (PIR), MSANT12VMH01 (Microwave), Bluetooth variants — sold separately, compatible with both voltage variants

Certifications & Rebates

Both variants UL cUL listed for wet locations. DLC Premium listed — eligible for utility rebate programs in most U.S. states and Canadian provinces. Verify eligibility at designlights.org. TAA compliant for federally funded projects.

Typical Applications

• High-Ceiling Warehouses & Distribution Centers: 62,000 lm at 350W covers the tallest racking and widest bays in high-cube facilities; both voltage variants available for any distribution system
• Large Manufacturing & Heavy Industrial Facilities: 65°C ambient tolerance and wet-location rating handle extreme production floor environments
• Aircraft Hangars: Ultra-high output and large 24.25" aperture deliver uniform coverage across the widest spans
• Municipal & Government Facilities: TAA compliant — qualifies for federally funded retrofit and new construction projects
• Commercial Garages & Auto Service: 5000K daylight CCT maximizes color contrast for inspection and detail work
• Stadiums & Arena Facilities: 62,000 lm / 350W handles the highest gymnasium, arena, and indoor sports venue ceilings

What's Included

• GLT HBUL-350W-UV-50K-D10 UFO LED High Bay (selected voltage) with integrated LED engine, driver, and wattage adjustment dial
• Pre-installed hook mount