Here's some pics. It seems like you could modify the emitter unlike the 4watt 2D model. I bought one when I bought the 4watt tactical light. It has a more diffused beam than the 2D model. I didn't try to unscrew the switch/clip ring-yet.
http://mysite.verizon.net/res1yioa/id1.html
http://mysite.verizon.net/res1yioa/id1.html