The temperature setting is perfect when a fine, white mist is seen to rise. Vapor which is barely visible indicates that either the temperature is too low or the material vaporized is totally exploited.
Thats off there Website

also there is a pdf table that shows the temperature to number here it is

http://www.vapormed.de/pics/down/Luf...ur%20table.pdf

Just my 2c

Bangbilo

ps cannabis vaporizes at 180-200 C