Question 1

What is the difference between a back-lit and edge-lit LED flat panel?

Accepted Answer

In a back-lit flat panel, the LEDs sit directly behind the diffuser, so the light source is spread across the full face of the fixture. Edge-lit designs mount the LEDs along the perimeter and use a light guide plate to redirect light across the panel. Back-lit panels generally deliver higher lumen output, more uniform light distribution, and better efficacy at higher wattages. They also tend to hold up better over time, since edge-lit designs can develop brighter areas near the edges as the light guide ages. For a 2x4 commercial application, back-lit is the go-to choice when consistent foot-candle levels are required across large spaces such as offices, classrooms, and medical facilities. This WareLight panel reaches 9,000 lumens at 72W, which works out to 125 lumens per watt, a level of efficiency that's difficult to match in an edge-lit fixture at a comparable price point.

Question 2

Is this flat panel rated for outdoor or damp/wet location use?

Accepted Answer

No. This is a dry-location, indoor-only fixture. It's not rated for outdoor installation, covered overhangs, restrooms with high moisture levels, car washes, food processing environments, or any other wet or damp location. If you need a panel-style fixture for a space with moisture exposure, a vapor-tight fixture is the right choice. This panel is for use in offices, conference rooms, retail spaces, schools, and healthcare facilities.

Question 3

How does the selectable wattage and CCT feature work, and how do you change the settings?

Accepted Answer

The fixture has a small multi-position switch on the driver housing that you set before installation. For wattage, you can choose from 30W, 40W, 50W, 60W, and 72W, which correspond to lumen outputs of 3,750, 5,000, 6,250, 7,500, and 9,000. For color temperature, you can select 3,000K, 3,500K, 4,000K, 5,000K, or 6,500K. The practical advantage is that you can order one SKU for an entire project and configure each fixture for the space where it lands. A break room or storage area might only need 40W at 3,000K or 3,500K, while a medical exam room or quality control station might call for a full 72W output at 5,000K or higher. You set it once during installation, and that's how the fixture runs. Brightness is not adjustable from a wall switch unless paired with a compatible 0-10V dimmer.

Question 4

Does DLC Premium certification affect rebate eligibility for this fixture?

Accepted Answer

Yes, and it is worth paying attention to. DLC Premium is the higher-tier qualification level under the DesignLights Consortium program. Most utility rebate programs across the U.S. accept DLC Standard fixtures, but a growing number offer enhanced rebates for DLC Premium-listed products. Because this WareLight panel carries DLC Premium certification, it qualifies for the broadest range of utility incentives available. On a multi-fixture commercial or office retrofit, the difference between Standard and Premium rebate tiers can meaningfully reduce your net cost per fixture. Rebate amounts and program eligibility vary by utility and program year, so it's worth confirming with your local utility before you finalize your spec.

Question 5

Can this panel replace an existing 2x4 fluorescent troffer?

Accepted Answer

If you have a standard T-bar drop ceiling grid with 2x4 bays, this panel drops right in without modification. At 47.72 inches by 23.74 inches, it's sized to lay into standard 15/16-inch T-bar grid ceilings. If the original fluorescent was surface-mounted or pendant-hung, you will need to add the optional surface-mounting kit or hanging-cable kit at checkout. The panel is only 1.48 inches deep, so clearance above a dropped ceiling is rarely a concern. From an electrical standpoint, it wires directly to your existing circuit at 120 to 277V, no ballast bypass required; just connect the leads and set your wattage and CCT before the panel goes in. If emergency backup lighting is required in your space, WareLight makes a compatible 90-minute emergency driver for this panel series (sold separately).

Management number	250440374	Release Date	2026/09/17	List Price	US$30.00	Model Number	250440374
Category	LED Lighting LED Troffers & Panels

2 x 4 Foot Back Lit LED Flat Panel, 9000 Lumen Max, Selectable Wattage and CCT, Dimmable, 120-277V

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