[Lab] LED temperature

[Michael Ayukawa]

Cree specifies a max junction temperature of 150C for some of their LED products.
Note that anything you measure on the heat sink will be considerably less than junction temp.
If you do a google “cree led maximum junction temperature” you will get data sheets and application notes.
Most of the application notes require detailed calculations using parameters that you likely have little data.

The important thing is that the lifetime of the LED drops very quickly as you approach the reliability
temperature limit.