28 / 34 / 41 / 50 Watt Adjustable 2X4 LED Backlit Panel Light | 4000 to 6500 Lumens | 2700K / 3000K / 3500K / 4000K / 5000K Adjustable | 100-277V | Surface Mount
This surface-mounted 2x4 backlit panel is a practical fluorescent troffer replacement for offices and classrooms, offering adjustable 28-50W output, 4000-6500 lumens, and five selectable color temperatures. Its 0-10V dimming supports lighting control, while the 110-degree beam angle provides broad distribution. The aluminum alloy housing, polycarbonate lens, UL listing, 50,000-hour L70 life, and 5-year warranty support long-term indoor installations operating from -4 F to 113 F.
Dwayne Kula | President, CTO and Founder
686 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 2×4 LED backlit panel light is a surface-mounted interior fixture with selectable wattage and color temperature. It provides a fluorescent troffer replacement option where a surface-mounted ceiling fixture is required.
The fixture operates from 100-277V and uses a white aluminum alloy housing with a polycarbonate lens. The 2×4 form factor measures 47.81 inches long by 23.78 inches wide.
Core Performance and Output
Selectable wattage settings include 28W, 34W, 41W, and 50W. Output ranges from 4,000 to 6,500 lumens at 130 lumens per watt.
The standard 110 degree beam distribution provides broad interior illumination through the polycarbonate lens. Higher output settings can create excessive light levels in smaller or lower ceiling spaces if fixture placement is not adjusted.
The fixture operates on 100-277V, 50/60Hz power and has an 80+ CRI. Color temperature is selectable from 2700K, 3000K, 3500K, 4000K, and 5000K.
Adjustability and Control Options
Wattage adjustment allows the fixture output to be set at 28W, 34W, 41W, or 50W. This supports different light-level requirements without changing the fixture body.
Color temperature adjustment provides five selectable settings from 2700K through 5000K. The selected color temperature should remain consistent across a connected lighting layout.
0-10V dimming is included. Dimming wiring and control equipment must be compatible with the fixture’s 0-10V dimming input.
Longevity and Reliability
The LED system is rated for 50,000 hours at L70. This rating indicates the point at which light output reaches 70 percent of its initial level.
The fixture is rated for operation from -4 degrees F to 113 degrees F. Long-term performance depends on maintaining the fixture within this operating temperature range.
Build Quality and Physical Characteristics
The housing is aluminum alloy with a white finish. The fixture uses a polycarbonate lens for the optical assembly.
Dimensions are 47.81 inches long, 23.78 inches wide, and 1.2 inches high. Fixture weight is 9.2 pounds.
This model is configured for surface mounting. The mounting surface must support the fixture weight and accommodate the 2×4 footprint.
Where This Product Fits Best
This panel light fits interior spaces that use broad, even ceiling illumination and have a surface-mount installation requirement. Its selectable output and color temperature support different interior lighting conditions.
- office lighting
- educational facility lighting
- healthcare facility lighting
- commercial interior lighting
- conference room lighting
- corridor lighting
The fixture is intended for indoor use within its listed operating temperature range. Surface mounting is relevant where recessed installation is not part of the ceiling design.
Installation and Long-Term Use
Install the fixture on a surface that supports its 9.2-pound weight and full 2×4 dimensions. Confirm the available supply voltage is within the 100-277V operating range before energizing the fixture.
Set wattage and color temperature before finalizing the layout so fixtures operate consistently across the space. Connect 0-10V dimming conductors only when a compatible dimming system is part of the installation.
For long-term service, keep the polycarbonate lens clean and inspect mounting points and electrical connections during scheduled maintenance. The fixture should remain within its -4 degrees F to 113 degrees F operating range.
How This Fixture Is Commonly Used
These fixtures are surface mounted in ceiling layouts where the 2×4 form factor aligns with the room layout and ceiling structure. Mounting height, selected wattage, and the 110 degree beam angle affect final fixture placement.
Layouts typically use consistent color temperature settings across connected areas. Higher wattage settings increase output, while lower settings can better align with lower ceiling conditions or reduced light-level requirements.
Spacing and fixture count depend on mounting height, target light levels, and the selected 4,000 to 6,500 lumen output setting. A layout should account for the surface-mount fixture footprint before installation begins.
Safety, Certifications, and Warranty
This fixture is UL listed. It is rebate eligible.
The fixture includes a 5-year warranty. Electrical installation must follow applicable requirements for the installation location.
Frequently Asked Questions
Q: What wattage settings are available?
A: The fixture has selectable 28W, 34W, 41W, and 50W settings.
Q: What color temperatures can be selected?
A: Available color temperature settings are 2700K, 3000K, 3500K, 4000K, and 5000K.
Q: Does this panel light support dimming?
A: Yes. The fixture supports 0-10V dimming.
Q: What should be considered when planning fixture spacing?
A: Mounting height, target light levels, selected wattage, and the 110 degree beam angle affect spacing and layout. The supplied data does not establish a specific spacing value.
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 selection depends on the required light level and layout.
Q: What mounting method does this fixture use?
A: This fixture is configured for surface mounting.
Q: What voltage range is supported?
A: The fixture operates on 100-277V power.
Web ID: 2784