At what temperature can cigarettes ignite a flame?

Cigarettes can ignite a flame when the temperature reaches approximately 550 to 1350 degrees Fahrenheit. This range encompasses the temperatures at which the materials found in cigarettes, such as tobacco and paper, begin to smolder and produce enough heat to sustain combustion. Understanding this ignition range is critical for fire investigators because it helps in determining the potential risks associated with smoking materials in fire incidents.

The lower end of the temperature range is particularly significant, as it reflects the threshold at which smoldering can occur without the need for an open flame, illustrating how easily fires can start from cigarettes. Since the other response options do not cover the complete ignition range, they fall short of effectively identifying the critical temperature necessary to start a fire with cigarette materials.