If there is one method that VERY often people have problems with, its the lightbulb method, in its different forms. Some people feel the smoke to be too harsh, or have problems because as dmt melts it runs away from the flame, or they burn the dmt, or too much residue/condensation happens, or they cant breakthrough, etc....
Some people do use it but from so many negative reports I say you should better try the three methods that seem to most success, which is either getting the vaporgenie pipe, or smoking in a water bong, sandwhiched between herbs, or the machine.