http://en.wikipedia.org/wiki/Ultraviolet

Fascinating...

Origin of the term
The name means "beyond violet" (from Latin ultra, "beyond"), violet being the color of the shortest wavelengths of visible light. UV light has a shorter wavelength than that of violet light.


Middle MUV 300 nm–200 nm 4.13–6.20 eV

TODDY gives me this sp code:


scna(D)


Ultraviolet LEDs
Light-emitting diodes (LEDs) can be manufactured to emit light in the ultraviolet range, although practical LED arrays are very limited below 365 nm. LED efficiency at 365 nm is approx 5-8% whereas efficiency at 395 nm is closer to 20% and power outputs at these longer UV wavelengths are also better. Such LED arrays are beginning to be used for UV curing applications and are already successful in digital print applications and inerted UV curing environments. Power densities approaching 3,000 mW/cm2 (30 kW/m2) are now possible and this, coupled with recent developments by photoinitiator and resin formulators make the expansion of LED-cured UV materials likely.



I suppose like a sun-lamp for tanning...you don't want to shine it in somebody's eyes...but it is a good idea as far as I can see...for domestic use...

I now have to type in a RED code: iperbib