So, I received my SureFire light today. (Thanks Big Buckeye for the link to the smoking deal) All, I really wanted was a light, but this came with a bunch of extras. I'm a dummy, so I have no clue what some of this stuff is for. For example, it has a bunch of filters that can be put on the light. There is an infrared filter, a red filter, a blue filter and a beam difuser. What the heck are those for?