1x4 LED T-Bar 5000 Lumens, Adjustable 20W-40W, Selectable CCT 3500K-5000K

After several weeks of usage, I've been generally pleased with the Kb supply LED Flat Panel Lights. Here's a breakdown of what I found:

Pros:

Selectable CCT: One of the most standout features of this product is the ability to select the color temperature. Whether you want a warm ambiance with the 3000K, a neutral tone with 4000K, or a cool daylight setting with the 5000K, the choice is yours. This versatility is especially useful when installing in different areas of the house to fit the desired mood.

Bright and Efficient: Offering a strong 4800lm output with just 48W, these lights are both powerful and energy-efficient. They have illuminated my kitchen and garage spectacularly.

I bought this panel to install under the overhead cabinets I bought and installed. The cabinets are up high enough (about 6'-6" off the floor) that the panel fits nicely under the 13" deep cabinets. I will soon install a desk under the area to make it a bench for my electronics work.

I would have preferred that the panel offer a 5-color option. I know there are some out there, but a trend I see in these color-controllable LED lights these days is that they omit 3500K. I find this odd because when the wife gets involved in choosing the color of the lights, 3500K is a good compromise between 3000K (women) and 4000K (men). But just about all of the vendors blow through 3500K. It's either 3000K, 4000K, or 5000K. I don't get it, but I needed something under there. These Kb supply panels seemed like a good value for the money.

Some people reading this review may be familiar with similar panels that Costco was selling a while back with the "Artika" brand. There are quite a few reviews of them on YouTube. The common complaint about them was that the lamp is so long, that the hanger bracket lets the ends of the panel float, causing the panel to sag a bit at the ends. Looking at the Kb supply panel, it appears to be identical to the Artika except that the hanger bracket is wider than the Artika bracket. Other than that, the panels themselves look to be identical.

And incidentally, both the Artika and this Kb supply panel LED light are NOT "flush mount." Due to the nature of the mounting scheme, there will always be a gap between the surface you are mounting to and the top of the panel light, about 3/16". If this bothers you, I guess you could nail some trim around the perimeter of the light, although I suspect that the gap provides some degree of air flow to the top side of the light to help cool the panel down from its 50W power dissipation.

When I got everything wired up, including a Maxxima slide dimmer (model MEW-DM600A), I found that the dimming control was awful. Flicker, I could tap the slider and the lights badly flickered, unable to set a minimum dim level to the 5% level that Kb supply said can be reached (it was more like 75% minimum brightness with the Maxxima dimmer), and so on. In short, something was not right between the panel and this dimmer. Which is at fault? I have a couple of old dimmers lying around, so I unsnapped my Wago connectors to remove the Maxxima dimmer and patched in a Cloudy Bay dimmer (model CBLD001WH). Same result: the panel and dimmer did not like each other.

I then got out my last junk box dimmer, an old Leviton SureSlide (Model 6672-1LW) and patched it in. This time, it works. No more flicker or jumping around. Success! The only drawback to the Leviton SureSlide dimmer is that there is no "trim" control for the minimum light. The minimum setting does NOT go to zero as Leviton says it will. However, it goes low enough that I am quite happy with it. If I want the light to go completely off, isn't that what the switch is for?

The panel puts out a lot of light over my desk area, and I can smoothly control the level with the Leviton dimmer. The 3 colors choices demonstrate to my eye why 5000K is a better color choice if you are concerned about color in your environment. Both the 3000K and 4000K make my light gray walls look yellow and brown, respectively, while the 5000K setting shows the walls to be gray.

Ceiling lights ... easy to install.

I installed it today in the kitchen. It works great so far. Even when I installed just 4 of them, it was already bright enough. I set them to just 18W, and my old kitchen looks refreshed and very bright now.

Easy to wire and install. Instructions came in the package. Easy to adjust for color and brightness.