Danger Will Robinson, This is a UV mod for my beloved harbor freight flashlight So here comes the disclaimers. UV is dangerous, it'll give you cancer, cataracts, and steal your check book, if you build this, You Will Die!! Although probably your death will not be related to this instructable. But seriously DO NOT shine this into anyone's eyes.
Step 1: Disassemble the Flashlight
take out the "circuit board"
Step 2: Unsolder
the existing leds, save them as supposedly they're 10,000 mcd's.
Step 3: Buy Some Uv Leds
I got mine from Alan Parekh in canada, $.35 each, not bad.
Alan is also an instructables user
Step 4: Solder
The Uv Leds into the circuit board
Step 5: Reassemble the Flashlight
and enjoy the pointlessness of a toy that causes cancer.
PS don't take this to a hotel, it'll spoil your nights sleep ;-)