Media Workers and TV Researchers - Please seek permission before posting on this site or approaching individuals found here by phone or email - write to the Editor - mail to

Home Forums General Discussion A good portable solar/hand crank radio/torch?? Re: A good portable solar/hand crank radio/torch??


Junction temperature is the temperature at the point where an individual diode connects to its base. Maintaining a low junction temperature increases output and slows LED lumen depreciation. The things affecting junction temperature are: drive current, thermal path. The higher the drive current, the greater the heat generated at the die. The amount of heat that can be removed depends upon the ambient temperature and the design of the thermal path from the die to the surroundings.