Abstract
LED is very weak in the case where it is to expose the hot environments. It maybe predicted that the deterioration of Diode as one of the elements of LED may occur in environments of more than about 80 ℃.The performance and lifetime of LED considerably go down under such high temperature environments. So, we have developed the radiatin cooling technique for releasing much quantities of heat produced from LED lamp to the outside environments using Aprm radiant materials (commercial name). The radiation cooling effect of Aprm radiant materials makes it possible to decrease the temperature of Diode, at least, within the range of about 20%, comparing with that in the case of without Apnn radiant materials. This fact indicates that the radiation cooling by Aprm radiant materials are very useful for releasing much quantities of heat generated from Diode.
