A back-lit LED panel is made of an array of LEDs fitted on a horizontal plate shining vertically down through a diffuser into the space to be illuminated. Back-lit panels are sometimes also known as direct-lit panels.
An edge-lit LED panel is made of a row of LEDs attached to the frame (or circumference) of the panel, shining horizontally into a light-guide plate (LGP). The LGP directs the light downwards, through a diffuser into the space below. Edge-lit panels are sometimes also known as side-lit panels.
The edge-lit design was chosen for several reasons: A light-guide plate (LGP) is an effective and simple way to diffuse the light, avoiding the risk of bright spots. Heat from the LED chips is dissipated via the frame, so the rear can be light-weight and it won’t get hot, so the driver can be placed here if required.
Technical advances have now allowed a new generation of back-lit LED panels to be introduced. These are often more efficient with lower unit costs than previous LED panels.
The lighting market now accepts back-lit panels as readily as edge-lit panels and, because back-lit panels require no LGP or rear reflector, they are often the lowest cost as well as the most efficient LED panels available.
At Toppo we offer a choice. We have Four edge-lit ranges and Four back-lit range.
Edge-lit range:
P02 Series: HB/Non-fireproof, UGR>19
P04 Series: Primastic UGR<19, HB/Non-fireproof
P06 Series: TP(a) fireproof, UGR>19
P08 Series: TP(a) fire-proof, UGR<19
Backlit range:
P03 Series: TP(b) fireproof, UGR>19
P05 Series: TP(b) fireproof, Primastic UGR<19
P07 Series: TP(a) fireproof, UGR>19
P09 Series: TP(a) fire-proof, UGR<19