We are currently serving a client who places exceptional emphasis on the thermal performance of commercial cooler lighting fixtures. Our communications have been ongoing for five months.
Why is the client so concerned about heat dissipation?
The fundamental reasons lie in two aspects:
Erste, as we mentioned in this article, why do LED lights emit light of different colors， during the operation of LED lights? When electrical energy is converted into light through the chip’s PN junction, a portion of the energy is inevitably released as heat – light emission is always accompanied by heat generation. Over prolonged operation, accumulated high temperatures accelerate the aging of LED chips and internal electronic components, directly shortening the fixture’s lifespan, leading to frequent replacements and significantly increasing maintenance costs.
Zweite, the heat emitted by the cooler’s lights adds directly to the overall heat load inside the refrigeration display showcase, forcing the compressor to run more frequently or for longer periods to maintain the set temperature, thereby raising energy consumption and operational expenses.
Tatsächlich, to address this challenge, our current LED cooler lights primarily adopt two approaches:
Enhanced heat dissipation structure: Aluminum extrusions are used to quickly conduct heat away from the LED chips. Zum Beispiel, the Laidishine SPU, LBF, and CNP series employ aluminum-based PCBs and a half-aluminum, half-plastic housing design to improve heat dissipation and ensure long service life.
Low-voltage, high-efficiency drivers: The driver is often the weak link in LED fixtures. We adopt 24V DC low-voltage power supply systems, which not only improve safety but also reduce overall heat generation. Gleichzeitig, we ensure that the drivers are equipped with low-temperature‑resistant components such as solid-state capacitors, allowing stable operation in sub‑zero environments and avoiding additional heat caused by frequent startups.
jedoch, after we provided the initial samples to the client, their test results showed that some heat was still escaping to the outside, while the client’s current product generates almost no perceptible heat. Als Antwort, we conducted repeated experiments and replaced the LED board material with fiberglass board – this material effectively traps the heat inside the lamp body, preventing it from being released into the cooler environment and thereby reducing the thermal load. But the trade‑off is that all the heat is now concentrated inside the body, raising internal temperatures and seriously threatening the fixture’s own lifespan.
Letztlich, after consultation, we adopted the following approach: reduce the total power of the fixture while increasing the luminous efficacy of the LEDs. With a significant reduction in power, even if the heat conversion ratio remains unchanged, the absolute amount of heat generated drops substantially. This solution meets the client’s stringent requirements for minimizing the internal heat load while keeping the lamp body temperature within a reasonable range to ensure durability. This balanced strategy offers both performance and reliability and is currently awaiting further validation and confirmation from the client.
