GLT HBUL-350W Field-Adjustable High Bay — 350/280/210/140W Selectable — 5000K — 347-480V — Dark Bronze

The GLT HBUL-350W-HV-50K-D10 is a commercial round UFO LED high bay engineered to deliver up to 62,000 lumens with field-adjustable 350W / 280W / 210W / 140W wattage settings and a dedicated 5000K color temperature. Operating on 347-480V electrical systems with 0–10V continuous dimming, this luminaire provides an ultra-high luminous flux for use in large indoor environments with clearances of more than 30 feet, acting as a direct energy-efficient replacement for legacy fixtures up to 1000W Metal Halide. Built with a wet location rating and UL Listing, it is qualified for commercial utility rebates under DLC Premium standards and features an extended thermal threshold for high-temperature applications.

Key Features

• Selectable Wattage: 350W / 280W / 210W / 140W — field-adjustable via onboard wattage adjustment dial
• Wattage Equivalency: Replaces legacy 750W to 1000W Metal Halide fixtures for direct energy savings
• Maximum Lumen Output: 62,000 lm at 350W
• Peak Efficacy: 177 lm/W for high-efficiency commercial operation
• CRI: 70 color rendering
• Color Temperature: Dedicated 5000K daylight CCT
• Lens & Optics: 120-degree lens guarantees light intensity and uniformity
• Dimming: 0–10V continuous dimming standard (dims down to 10%)
• Voltage: Universal 347-480V AC constant current driver
• Location Rating: UL Listed for wet locations
• Operating Temperature: −40°F (−40°C) to 131°F (55°C) ambient range at 350W; up to 149°F (65°C) for 280W and below
• Certifications: DLC Premium, UL Listed
• Rated Life: L70 100,000 hours per IES LM-80 results and TM-21 calculations
• Warranty: 5-year limited warranty — GLT
• Sensor Compatibility: Standard sensor receptacle accepts plug-and-play controls without internal wiring

Performance & Light Output

CRI 70 across all configurations. Rated life 100,000 hours (L70) per IES TM-21 testing. Delivers high luminous efficiency for use in large indoor environments with clearances of more than 30 feet.

Smart & Control Features

The HBUL-350W features an integrated low-voltage control receptacle supporting modular sensing and automated facility lighting control:

• 0–10V Continuous Dimming (Standard): Standard dimming control compatible with commercial 0–10V dimmers and centralized building automation systems (BAS).
• Sensor Compatibility (Accessory): Accepts field-installable PIR occupancy sensors and Bluetooth Smart Control sensors via the standard sensor receptacle without opening the internal driver compartment.

Compatible plug-and-play sensors include the MSANT12VPH01 (PIR Sensor) and MSANT12VPHB01 (Bluetooth PIR Sensor) — sold separately.

Electrical

Powered by a constant current driver operating on 347-480V AC. Delivers high electrical efficiency with a Power Factor >0.90 and Total Harmonic Distortion (THD) <20%. Includes pre-wired 0–10V dimming leads. RoHS compliant.

Construction

Housing & Thermal: Durable die-cast aluminum housing engineered with heat dissipating fins. The housing functions as a high-efficiency passive heatsink, dissipating heat away from LED arrays and internal driver circuits to preserve lumen maintenance across the 100,000-hour rated lifespan.

Lens & Optics: Features a fixed 120-degree lens.

Finish: Commercial polyester powder-coat finish in Dark Bronze.

Environmental Sealing: UL Listed for wet locations, providing a sealed barrier resistant to dust and moisture ingress. Extended ambient operating temperature range: −40°F (−40°C) to 131°F (55°C) at 350W, and capable of operating up to 149°F (65°C) at settings 280W and below.

Dimensions & Weight: 24.25" Dia × 7.47" H. Fixture weight: 17.32 lbs.

Installation & Mounting

Standard Hardware: Ships standard with a hook accessory for quick suspension installation.

Mounting Options: Compatible with rigid 3/4" conduit pendant mounting and hook mounting. Designed for easy access to the driver compartment from the face.

Recommended Mounting Heights: Optimized for large indoor environments with clearances of more than 30 feet.

Accessories (Sold Separately):

• Sensors & Controls: MSANT12VPH01 (PIR Sensor) | MSANT12VMH01 (Microwave Sensor) | MSANT12VPHB01 (Bluetooth PIR Sensor) | MSANT12VMHB01 (Bluetooth Microwave Sensor)

Certifications & Rebates

• DLC Premium: Qualifies for commercial lighting utility rebate programs nationwide
• UL Listed: Certified for wet locations per UL standards for commercial luminaires
• RoHS Compliant: Manufactured free of lead, mercury, and hazardous heavy metals

Typical Applications

• Heavy Industrial, Foundries & Mills — extended thermal engineering safely supports ambient operating temperatures up to 149°F (65°C)
• Open Warehouse & Distribution Floors — 120° wide optic and 62,000-lumen output provide broad, uniform distribution across large spaces
• Covered Loading Docks & Canopies — UL Listed for Wet Locations to safely protect against moisture in partially exposed areas
• Unconditioned Warehouses & Cold Storage — −40°C (−40°F) minimum ambient temperature rating supports reliable ignition in freezing environments

What's Included

• GLT HBUL-350W-HV-50K-D10 UFO LED High Bay — Dark Bronze
• Hook accessory
• Installation and operation instructions