Invisible flash

Anyone hear of this?

http://tech.yahoo.com/​blogs/null/146541

IR illumination is nothing new, night vision takes advantage of IR illumination and lasers. With normal flashes you can feel the heat from the IR light being released, I wonder how much heat radiation a dedicated IR flash will give out.

I'm more curious at how applicable a UV flash will be. The safe range of UV light is pretty narrow(after the first 55nm the light can give a tan, after the next 30nm the light becomes dangerous). 85nm max range(if that) vs. the 370nm range of visible isn't going to give a lot of "color" contrast.

But the pop of flash is fun

Seriously, I'm sure street photographers would take advantage of this in the not-so-distant future.