This is more effective as a heat sink than a (cheaper) plastic body. The better back-lit panels use a metal body. Compared with designs using more LEDs, this is less efficient (LEDs perform most efficiently with low drive currents), generates more heat, shortens the life of the LEDs and hastens the lumen depreciation. Too few LEDs (generally 36 or less) means that they have to be driven at a high current to generate the light output needed. This leads some manufacturers to promote back-lit panels as a low-cost option. What are the problems with cheap back-lit LED panels?īecause they have no LGP it is possible to make back-lit panels relatively cheaply. This is because the rear of the panel is the most convenient position for the driver and, because we offer 5 and 7 years warranties, we are keen that the driver should remain as cool as possible. Here at NVC we have had both designs in our product range, but we have decided that edge-lit is marginally better. The lighting market now accepts back-lit panels as readily as edge-lit panels.
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