Does the LED cabinet light have a good heat dissipation design?
Publish Time: 2025-04-29
In the home kitchen or commercial cabinet lighting scene, the LED cabinet light has become the mainstream choice due to its high efficiency, energy saving and long life. However, if the heat generated during its operation cannot be effectively dissipated, it will directly affect the performance and service life of the lamp. Therefore, heat dissipation design has become an important indicator for measuring the quality of the LED cabinet light.
When the LED chip is working, only about 30% of the electrical energy is converted into light energy, and the remaining 70% is released in the form of heat energy. When heat accumulates inside the lamp, the temperature of the LED chip will rise rapidly. Experimental data show that when the junction temperature increases by 10°C, the luminous efficiency of some LEDs may decrease by 3%-5%. If it is in a high temperature state for a long time, it will not only cause the light effect to continue to decay, but also accelerate the aging of the packaging material, the breakage of the gold wire and other problems, and even cause the chip to burn in extreme cases. Taking a certain brand of 5W bulb as an example, if effective heat dissipation measures are not adopted, continuous operation in an environment above 85°C may cause its life to be shortened by more than 50% compared with an environment of 65°C.
To meet this challenge, high-quality LED cabinet lights usually adopt a multi-dimensional heat dissipation design. In terms of material selection, the combination of aluminum substrate and fin heat sink is widely used in low-power LED products. Aluminum can quickly conduct heat without significantly increasing the weight of the lamp due to its good thermal conductivity and lightweight characteristics. A certain LED cabinet light using a 6063 aluminum alloy heat sink achieves natural convection heat dissipation by increasing the surface area, successfully controlling the chip temperature within 55°C without additional energy consumption.
For higher power requirements, active heat dissipation technology has become a key solution. The fan-forced heat dissipation system can reduce the thermal resistance to below 1.5°C/W, which is suitable for 50-100W projection lamp scenes. A laboratory test shows that the intelligent temperature control technology combined with the fan start and stop can not only avoid the heat dissipation failure caused by fan failure, but also effectively balance the noise and heat dissipation efficiency. In the field of 100-200W professional lighting, heat pipe technology has shown excellent performance. A 200W plant growth lamp uses an 8mm diameter heat pipe array, which can reduce the chip temperature from a peak of 85°C to 62°C within 30 minutes. Its thermal conductivity can be up to 80 times that of copper.
The optimization of the heat dissipation structure cannot be ignored either. By increasing the number of heat dissipation fins, optimizing the air duct design or using the temperature averaging technology, the temperature difference inside the lamp can be significantly reduced. A test of a street lamp module showed that the temperature difference between the edge and the center of the unoptimized radiator reached 22°C, while the temperature difference was reduced to less than 8°C after the integration of the temperature averaging. This design not only improves the heat dissipation efficiency, but also prolongs the light flux maintenance rate of the lamp in high temperature and high humidity environments.
For ultra-high power applications above 300W, the liquid cooling system shows unique advantages. The 1000W floodlight of a stadium adopts a closed-loop water cooling solution, which is combined with ethylene glycol solution to achieve a wide temperature range of -40°C to 120°C. The system integrates flow monitoring and leakage protection modules, which increases the mean time between failures to 50,000 hours, fully meeting the stringent requirements of commercial places for the reliability of lamps.
From the user's perspective, a good heat dissipation design not only extends the service life of lamps, but also reduces the long-term use cost. By optimizing the heat dissipation structure, the energy efficiency ratio of LED cabinet light can be increased by 15%-30%, which means that users can save more electricity expenses under the same lighting effect. In addition, stable temperature control can also reduce light decay and ensure that the items inside the cabinet always present true colors. For humid environments such as kitchens, heat dissipation design with IP65 protection level can better resist water vapor erosion and further ensure the stability of lamps.
The heat dissipation design of LED cabinet light is directly related to its performance and service life. Through the comprehensive application of material innovation, structural optimization and active heat dissipation technology, modern LED cabinet light can maintain efficient and stable operation in complex environments. For consumers, choosing lamps with professional heat dissipation design is not only a reflection of the pursuit of lighting quality, but also an effective control of long-term use costs.
