The ultra-thin edge lights are those of softest lighting source. It can be used without any filters, softboxes, or other modifiers. It's like having a built-in softbox.

Instead of forward-facing LEDs like in a conventional panel, the Edge LEDs are mounted around the outer edge, aimed inward at layers of diffusion material. Instead of a direct beam, the LED's bounced light approach produces a soft, even glow with no hotspots.