The "Fire Photography" is a technical revelator. Photographing fire involves a real understanding of the concepts of Classical Photography. It is essential to "understand the light" and the relationship between Speed - Exposure - Sensitivity. Making sharp images, at night, of a subject with almost no exposition and without "burning" the source of light itself which has its own nuances that make all the finesse of this type of imagery.
We offer you a tutorial here.
To follow this practice on Facebook there.