So, I just spent 45 minutes researching and explaining to some kid who thought you needed 1,000,000 degree (presumably Fahrenheit) hot light to make a lightsaber. Hehe, it's actually closer to 6000 (tungsten melts at 6200 degress Fahrenheit)
Oh, and my point was more or less that we actually have the ability to create that kind of heat, because they were implying it was something that we had no chance of doing
Considering we have a 3500000 Kelvin laser, I think we're fine for heat