<Li> Smoldering cigarette: <Ul> <Li> Temperature without drawing: side of the lit portion; 400 ° C (750 ° F); middle of the lit portion: 585 ° C (1,100 ° F) </Li> <Li> Temperature during drawing: middle of the lit portion: 700 ° C (1,300 ° F) </Li> <Li> Always hotter in the middle . </Li> </Ul> </Li> <Ul> <Li> Temperature without drawing: side of the lit portion; 400 ° C (750 ° F); middle of the lit portion: 585 ° C (1,100 ° F) </Li> <Li> Temperature during drawing: middle of the lit portion: 700 ° C (1,300 ° F) </Li> <Li> Always hotter in the middle . </Li> </Ul> <Li> Temperature without drawing: side of the lit portion; 400 ° C (750 ° F); middle of the lit portion: 585 ° C (1,100 ° F) </Li> <Li> Temperature during drawing: middle of the lit portion: 700 ° C (1,300 ° F) </Li>

What is the second most common form of ignition