28 / 34 / 41 / 50 Wattage Adjustable Surface Mount 2X4 LED Backlit Panel Light | 4000 to 6500 Lumens | 2700K / 3000K / 3500K / 4000K / 5000K Adjustable | 100-277V
This surface-mount 2×4 panel is a practical fluorescent troffer replacement for offices and classrooms, with selectable 28-50W output, 2700K-5000K color temperature, and 0-10V dimming to suit changing room needs. Its 130 lumens per watt efficiency, 110-degree distribution, aluminum housing, and polycarbonate lens support dependable general lighting. UL listing, 50,000-hour L70 life, and a 5-year warranty add confidence for standard commercial interiors.
Dwayne Kula | President, CTO and Founder
723 in stock
Product Specifications
Key Features
| Brand | LED Lighting Supply |
| Watts | 28 | 34 | 41 | 50 |
| Lumens | 4000 | 4500 | 5300 | 6500 |
| Lumens Per Watt | 130 |
| Replaces | Fluorescent Troffer |
| Voltage | 100V-277V |
| Color Temperature | 2700K or 3000K or 3500K or 4000K or 5000K |
| CRI | 80+ |
| Dimming | 0-10V |
| Beam Angles (Std) | 110° |
| Optics | Polycarbonate Lens |
| Lifespan | 50,000 (L70) hours |
| Mounting | Surface |
| Fixture Color | White |
| Frequency (Hz) | 50/60 |
Durable Construction
| Housing | Aluminum Alloy |
| Operating Temperature | -4°F to 113°F |
| Certifications | UL | Rebate Eligible |
| Warranty | 5 years |
Measurements
| Dimensions (in) | 47.81 L x 23.78 W x 1.2 H |
| Weight (lbs) | 9.2 |
Product Lighting Layout Estimator
Use this estimator to calculate approximate fixture count, spacing, and average foot-candles for a simple rectangular space using the selected LED fixture. Enter your room dimensions, mounting height, target foot-candles, light loss factor, and room/layout condition to generate a preliminary lighting layout. When IES photometry is available, workplane height and room reflectance controls are shown.
Project Inputs
Estimated Results
Estimated average foot-candles are preliminary and should be verified with a lighting plan for project-critical applications.
Room / Layout Condition: This field is used only when usable IES photometry is not available. In fallback mode, it acts as a simplified room utilization factor for reflectance, fixture distribution, racking, obstructions, and how much fixture light reaches the work area. Open / light-colored spaces use 0.90, typical warehouses or shops use 0.75, racked or obstructed spaces use 0.60, and dark or complex spaces use 0.45. When IES photometry is active, this field is hidden and the estimator uses the selected workplane height, LLF, and simplified reflectance adjustment instead.
Photometry / Simulation Note: When usable IES photometry is available for the selected fixture, this estimator uses the fixture’s IES candela data, selected workplane height, light loss factor, and simplified reflectance adjustment to estimate fixture count, average foot-candles, and visual light distribution. The reflectance adjustment is a conservative approximation and is not a full zonal-cavity, radiosity, or professional photometric room calculation. When IES photometry is not available, the estimator uses a simulated beam model based on lumens, mounting height, room/layout condition, light loss factor, and beam angle.
Preliminary Estimate Only: This estimator is intended for simple square or rectangular spaces and should be used as a planning aid, not a final photometric lighting plan. Actual light levels may vary based on fixture optics, selected IES file, mounting conditions, workplane height, ceiling height, surface reflectance, obstructions, controls, voltage, installation conditions, and site-specific requirements. Project-critical applications should be verified with a formal lighting plan.
This estimate is a starting point. Warehouses, industrial facilities, hazardous locations, sports areas, schools, healthcare spaces, public areas, and code-sensitive projects may require a reviewed lighting layout before purchase or installation.
Product Overview
This surface mount 2×4 LED backlit panel light provides adjustable output from 28 to 50 watts and adjustable color temperature from 2700K to 5000K. It is designed for commercial interior ceilings where a surface-mounted panel is required.
The fixture replaces fluorescent troffers and uses an aluminum alloy housing with a polycarbonate lens. Its 1.2-inch housing profile suits finished ceiling areas where recessed installation is not part of the ceiling construction.
Core Performance and Output
Selectable wattage settings produce 4000, 4500, 5300, or 6500 lumens. Fixture efficacy is 130 lumens per watt, with a standard 110-degree beam distribution for broad downward illumination.
The fixture operates on 100-277V, 50/60 Hz power and supports 0-10V dimming. The 6500-lumen setting can be excessive in lower ceiling areas when lower light levels are required.
Adjustability and Control Options
Wattage adjustment allows output selection at 28W, 34W, 41W, or 50W. Color temperature adjustment provides 2700K, 3000K, 3500K, 4000K, and 5000K settings.
The 0-10V dimming capability supports installations using compatible 0-10V lighting controls. Wattage and color temperature should be set before final commissioning so fixtures remain consistent across the layout.
Longevity and Reliability
The panel is rated for 50,000 hours at L70. This rating indicates the point at which light output is maintained at 70 percent of initial output.
The operating temperature range is -4F to 113F. Long-term performance depends on maintaining suitable ambient conditions and completing wiring connections correctly during installation.
Build Quality and Physical Characteristics
The fixture uses an aluminum alloy housing, white finish, and polycarbonate lens. It measures 47.81 inches long by 23.78 inches wide by 1.2 inches high.
Fixture weight is 9.2 pounds. The surface mounting configuration requires a ceiling structure that can support the fixture and its mounting method.
Where This Product Fits Best
This panel is suited to finished commercial interior spaces that use 2×4 ceiling lighting and require selectable output and color temperature. Its surface mount construction fits locations where a recessed troffer installation is not used.
- office lighting
- educational facility lighting
- commercial interior lighting
- healthcare facility lighting
- conference room lighting
- corridor lighting
The polycarbonate lens and broad beam distribution support general interior illumination. The stated operating range should be considered where ambient temperatures may approach the fixture limits.
Installation and Long-Term Use
The fixture mounts on the ceiling surface and operates from 100-277V power. Confirm the mounting surface, fixture support, branch voltage, and 0-10V control wiring requirements before installation.
Set wattage and color temperature consistently before energizing the completed layout. Access for future service should remain available around the surface-mounted housing.
How This Fixture Is Commonly Used
In office lighting, educational facility lighting, and commercial interior lighting layouts, these panels are arranged in ceiling rows or grid patterns to maintain even coverage across the occupied area. Mounting height affects the spread and overlap produced by the 110-degree distribution.
For healthcare facility lighting, conference room lighting, and corridor lighting, output selection is typically matched to the required light level and fixture layout. Higher output can reduce fixture count, but it may also increase brightness directly below each panel.
Safety, Certifications, and Warranty
This fixture is UL listed and rebate eligible.
The warranty is 5 years. The fixture is rated for operation from -4F to 113F.
Frequently Asked Questions
Q: What output settings are available?
A: The selectable output settings are 4000, 4500, 5300, and 6500 lumens, corresponding to 28W, 34W, 41W, and 50W settings.
Q: What color temperature settings are available?
A: The fixture provides selectable 2700K, 3000K, 3500K, 4000K, and 5000K color temperatures.
Q: Does this panel support dimming?
A: Yes. The fixture supports 0-10V dimming.
Q: What should be considered when planning the fixture layout?
A: Mounting height, selected lumen output, target light levels, and the required layout affect panel placement. The supplied product data does not establish a specific spacing value or fixture quantity.
Application Questions and Clarification
Q: Is this fixture appropriate for office lighting and educational facility lighting?
A: Office lighting and educational facility lighting are valid applications for this panel light. Final output and color temperature selection depend on the required light level and project layout.
Q: What should be reviewed for corridor lighting layouts?
A: Review the ceiling mounting surface, mounting height, selected output setting, and required light distribution. The supplied product data does not establish a specific corridor spacing value.
Q: Can the same fixture setting be maintained across commercial interior lighting areas?
A: Yes. Wattage and color temperature are adjustable, allowing the selected settings to be matched across the installed fixture layout.
Web ID: 2784
