Recently, i obtained a 100mW green laser pointer, and the thing gets me confused. On one side, the beam is bright enough to see from some distance at 90* angle to it, and the point is visible on a hillside some miles away. On the other hand, it doesn't burn anything, like advertisements often say. Even more, pointing it on a thermistor of a digital thermometer gives no temperature increase whatsoever. The beam looks like in the commercials, but the match-lighting part is wholly missing. So, are there lies somewhere, or am i missing some parameter? What really is and is not possible with these things? EDIT: Also, is it normal for the pointer to work only for about a minute at a time? At start, it gains brightness in discrete steps, over about a second, then work at full for about a minute, then becomes dimmer, in discrete steps again. Trying to lit it up right after gives only fractional power - it does not reach the highest steps. If you wait a few minutes, it works fine again. Is that a normal behavior?