I was thinking the same thing. Wikipedia tells us that a flame is visible at 525 °C (977 °F). (I don't know if this is relevant as they talk about a 'plasma' an

I was thinking the same thing. Wikipedia tells us that a flame is visible at 525 °C (977 °F). (I don't know if this is relevant as they talk about a 'plasma' and not a flame.) This might sound too hot to be safe but it only has to be that temperature for a very short time so presumably the energy density doesn't have to be very high.