Ultraviolet LED's

So I got a pack of Sparkfun LED's and some UV LED's on the side. A little investigation led to the conclusion that the separate LED's are rather superflous. It turns out the 'violet' LED's in the Sparkfun pack have the exact same wavelength as the LED's sold separately.

They are both of the class called 'UVA' which goes from 400 – 315 nm. The separate LED's do however seem to be a bit brigther. Also the construction itself of the two differ a tiny bit - we are talking sub-millimetre and fractions of degrees.

Here's a table of UV wavelengths, ripped right out of Wikipedia.

Ultraviolet	UV	400 – 100 nm	3.10 – 12.4 eV
Ultraviolet A	UVA	400 – 315 nm	3.10 – 3.94 eV	long wave, black light
Ultraviolet B	UVB	315 – 280 nm	3.94 – 4.43 eV	medium wave
Ultraviolet C	UVC	280 – 100 nm	4.43 – 12.4 eV	short wave, germicidal
Near Ultraviolet	NUV	400 – 300 nm	3.10 – 4.13 eV	visible to birds, insects and fish
Middle Ultraviolet	MUV	300 – 200 nm	4.13 – 6.20 eV
Far Ultraviolet	FUV	200 – 122 nm	6.20 – 10.16 eV
Hydrogen Lyman-alpha	H Lyman-α	122 – 121 nm	10.16– 10.25 eV
Extreme Ultraviolet	EUV	121 – 10 nm	10.25 – 124 eV
Vacuum Ultraviolet	VUV	200 – 10 nm	6.20 – 124 eV