Does the heat matter in LED lighting design?

SPEAK TO A LIGHTING SPECIALIST

Does the heat matter in LED lighting design?

 

 by BoscoLighting Team on 08 October 2013

LED lighting, like every electrical appliance generates heat when working. However, LED lighting generates much less heat compared to halogen, CFL, fluorescent tube or metal halide fittings thanks to its high luminous efficacy, while having the same brightness output.

But the heat from LED lighting does play a role in its longevity as too much heat trapped in an LED light can result in abnormal brightness, lumen depreciation and shorter lifespan.

Heat in an LED light fitting is mainly generated at the PN junction of the LED chip. A rise in temperature triggers the process in the PN junction to work increasingly fast till it reaches a limit, causing the performance of the LED chip to become unstable, and progressively decrease the brightness till it eventually dies out.

One way to avoid this issue is to prevent the PN junction from generating too much heat, and the other is to dissipate heat immediately. There are many components inside the LED light that can contribute to prevent the issue, such as a better LED chip, a constant current power supply/circuit to stabilise the performance of all LED chips in an LED light, a high quality PCB that wastes less energy on heat generation, aluminium base plate to transfer heat from the LED chips quickly, and a well-designed heat sink to dissipate heat faster.

Product designers, therefore have to balance every element well to maximise LED lighting performance. Temperature rise indicates the performance of heat dissipation, and represents the temperature of LED lights minus the ambient temperature. For example when the LED light is tested and reads 50°C and the ambient temperature is 22°C, the temperature rise is 28°C. Therefore, the standard of temperature rise for LED lighting design is <30°C.

BoscoLighting manages all LED products to be designed within a 30°C temperature rise while maximising the brightness of LED chips to ensure excellent performance with reasonably long lifespan.

BoscoLighting Pty Ltd is a 100% Australian company that has partnered with a well-established and government-funded manufacturer in China to offer a wide range of LED products, a 3-year warranty and custom design options.

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