Lithonia DLB48 LED Linear High Bay
Our DLB48 LED linear high bay is engineered for demanding commercial and industrial environments where powerful, efficient illumination is essential. This 4-foot fixture delivers up to 25,000 lumens while consuming just 206 watts, making it an ideal replacement for outdated metal halide and high-pressure sodium systems.
With an exceptional L70 lifespan of 100,000 hours and a wide operating temperature range of -40°F to 131°F, the DLB48 performs reliably in warehouses, manufacturing facilities, distribution centers, and cold storage applications. The 0-10V dimming capability provides flexibility to adjust light levels based on occupancy and task requirements, further reducing energy costs.
- 25,000 lumen output at 206 watts for maximum energy efficiency
- 100,000-hour L70 rated lifespan reduces maintenance frequency and costs
- 0-10V dimming control for adaptive lighting and additional energy savings
- Operates reliably in extreme temperatures from -40°F to 131°F
- 4-foot linear form factor with versatile mounting options
Construction & Thermal Management
The Lithonia DLB48 features a die-cast aluminum housing designed to withstand the rigors of industrial environments while providing superior heat dissipation. The robust construction ensures consistent LED performance even during extended operating periods at maximum output.
Integrated thermal management technology actively draws heat away from the LED array, maintaining optimal junction temperatures that preserve lumen output and extend component life. The sealed optical chamber protects internal components from dust, moisture, and particulates common in warehouse and manufacturing settings.
Mounting Configurations & Installation
Flexible Installation Options
The DLB48 ships with universal mounting hardware compatible with standard ceiling grid systems, chain suspension, and pendant installations. Adjustable mounting brackets accommodate a range of ceiling heights from 16 to 40 feet, ensuring proper light distribution across your workspace.
Electrical installation is straightforward with pre-wired quick-connect components and clearly labeled wiring compartments. The fixture accepts 120-277V input, eliminating the need for separate drivers or transformers in most commercial applications.
Energy Performance & Rebate Eligibility
With an efficacy rating exceeding 121 lumens per watt, the DLB48 qualifies for utility rebate programs across North America. The DLC Premium listing ensures maximum rebate amounts in jurisdictions with tiered incentive structures.
Typical energy savings compared to 400W metal halide fixtures exceed 50%, with additional reductions available through dimming strategies. The long-rated life eliminates costly lamp replacements and reduces maintenance labor by up to 90% over the fixture’s operational lifespan.
Complementary Commercial LED Solutions
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Common Questions About the DLB48 Linear High Bay
The DLB48 is optimized for mounting heights between 16 and 40 feet. At these heights, the 110° beam angle provides uniform illumination across workspaces while minimizing glare.
For ceiling heights below 16 feet, consider our JEBL low bay series. For installations above 40 feet, the higher-output IBG round high bay may be more appropriate.
The DLB48 is rated for dry and damp locations, making it suitable for covered outdoor areas such as loading docks, canopies, and breezeways. It is not rated for direct exposure to rain or snow.
For fully exposed outdoor applications, we recommend our CPX canopy series or our outdoor area lighting products that carry wet location ratings.
The DLB48 includes integrated 0-10V dimming capability compatible with all standard 0-10V control systems, wall dimmers, and building automation platforms. Dimming range is smooth from 100% down to 10% output.
For occupancy-based control, pair the fixture with our Sensor Switch line of occupancy and daylight sensors for automated operation and maximum energy savings.
Traditional metal halide fixtures typically require lamp replacement every 10,000-20,000 hours. The DLB48's 100,000-hour L70 rating means it will maintain at least 70% of initial output for a decade of continuous 24/7 operation.
In a typical warehouse operating 12 hours daily, you can expect 20+ years before the fixture reaches its L70 threshold. This virtually eliminates the maintenance cycle and labor costs associated with lamp replacement programs.
The DLB48 operates on standard 120-277V input and uses the same junction box connections as traditional high bay fixtures. Most installations can directly replace existing fixtures using the same electrical infrastructure.
If adding dimming control where none existed previously, you'll need to run low-voltage control wiring between the dimmer and fixtures. Our technical support team can provide wiring diagrams for your specific configuration.
The DLB48 carries DLC Premium certification, which qualifies it for rebate programs offered by most North American utilities. Rebate amounts vary by jurisdiction but typically range from $50-150 per fixture.
Contact your local utility provider or visit their website to confirm current rebate offerings. We can provide the technical specification sheets and DLC documentation needed for rebate applications.
The DLB48 requires minimal maintenance beyond periodic cleaning of the lens to maintain optimal light transmission. In dusty environments, wipe the lens with a soft cloth quarterly.
No lamp replacement, ballast service, or other routine maintenance is required during the fixture's rated lifespan. The sealed optical chamber protects internal components from contamination in industrial environments.