The two kinds of illumination methods have their own advantages and disadvantages. The difference between edgelit panel and backlit panel is structure, there is no light guide plate on backlit panel, and the light guide plate (PMMA) generally has a transmittance about 93%.
Since the distance between each LED source is relatively large, the distance between LEDs and the PC diffusion plate must be relatively large, so that a dark region is not formed when the lamp is lighting on.
The light emitted by edgelit panel lamp bead is reflected by the light-reflecting film of the light guide plate, and is irradiated. After passing through the light guide plate, the luminous flux will have a certain loss.
The shortcoming of the backlit panel lamp is that the thickness of the lamp is generally 3.5cm-5cm, but another one with only 8mm-12mm thickness, which is much thicker than edgelit panel, it will cost more package and shipping cost, but its werlight lower.
The advantage of backlit panel light is that with high lumen based on same range of LEDs.