@ I-board, Edge Lit LED Panel
The light source is around the panel and enters the panel
on the side and "breaks out" across the surface of the panel. To have the softest light effect, the source is not straight forward but directed to the viewing surface instead. This panel is characterized by super slim design.
@ I-switch, LED Back lit Panel
The light source is right back of the panel, loosing a bit on the thin desing size because of a need to keep some distances between the light source and the panel's diffuse, winning a flawless uniform brighness on the surface.
The LED modules in use for this panel are easier in the event of replacement needs.