How to Test UV LEDs

Ultraviolet LEDs produce ultraviolet light which your eye can't see.  This is how I tested to make sure that the  UV LEDs I bought were working correctly.

Here's what you need:

• Your UV LED
• A DC Power supply or appropriate battery
• Transitions glasses (Photochromatic Glass)

Transitions lenses use a special photochromatic coating that responds to Ultraviolet radiation.  The stronger the UV radiation the darker the lenses become.  I have a pair of photochromatic glasses so I used them to test out my LEDs.

• Just put your glasses in front of your LEDs.
• Turn the LEDs on by plugging them in.
• Wait a minute or 2 with the LEDs on.  It's best not to look at them without eye protection.
• See if the glasses change color.

That's it!