UV Flashlight Keychain 22000mcd (5-Pack)

Pros: does make a cool purple light that u can tell is UV but also high end visible light. left them on for 2 days and they still shine just as bight as they did wen i got them.

Cons: i think CSI is exagerating wen they go over a room with a UV light. (yes i checked, it does show up blood .... and other substances but not as well as CSI makes it out to be, they do use stronger/bigger lights but even up close these ones dont show traces of substaces if there isnt any there to the naked eye)
one of mine doesnt stay on unless i hold the button down.

Other: reasonably cheap so get some if u want but dont expect to shine it in a friends bed or on someones hand/face and laugh at them, it doesnt work that way with these

Pros: People have written some very strange things about these and other UV light sources. This is a very handy to have and use UV light. Use it to check that money is real and also if you mark your property with a UV marker pen, you need a UV light source. These are perfect for those two. Anything else and you are using as a toy. nothing wrong with that if that is your purpose.

Cons: Cons? From DE? Delivery timeframe, nothing else.

Other: Get 'em. They are great. Get a couple of these while you are ordering the UV lights. --> http://www.dealextreme.com/p/invisible-ink-pen-88 - go on, what are you still reading this for? Get on with it. :-)