何謂絕緣層
絕緣層是設計用來保留熱量並提供隔熱的材料層。這些層阻止熱量在照明系統與周圍隔熱材料（例如玻璃纖維或纖維素隔熱材料）之間傳遞。它通過建立一個屏障來確保安裝的安全性，該屏障限制燈光產生的熱量達到危險水平。
Typically, insulating layers are constructed using two layers of metal casing with a pocket of air in between. This configuration helps to diffuse the heat and prevent the outer layer of metal from becoming excessively hot. By effectively insulating the lighting system, these layers contribute to energy efficiency by reducing heat loss and allowing for the use of lower wattage lamps.
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