Don't know how many are interested in putting a light on their gun but most of those things I've seen can get pretty expensive , then today when shopping for some more rechargeable batteries at a sight I found some what look like a few good alternatives to the $200 + setups .
Here is a mount that appears to be able to accept any standard Tail cap activated light at a fraction of the cost of many other on the market .
The site http://www.batteryjunction.com/
has a large selection of ultra bright lights that should serve well as the expensive alternative of a SureFire light that can run into the hundreds of dollars .
Here is just one example of a light with a 600+ Lumen output that is less than $100 and if you really want to save some money can use rechargeable RCR123A batteries that are also listed on the page for sale for $29.00
That light mounted on a Home Defense weapon would make for one heck of a deadly illuminated combination when things go bump in the night .