I came upon this mod using what seems to be Welch Allyn's 10W HID lamp with what seems to be a Japanese built ballast. (If we have some members who read Japanese, perhaps he/she can translate the article for all the rest of us? I read Chinese, English and French but sadly not Japanese.) Ther is even a beam photo with the Surefire 9AN as reference. Website: http://homepage3.nifty.com/ledsurefire/starthp/subpage12.html What is very interesting is how the battery holders are made by cutting and gluing 2 AA cells holders. Enjoy /ubbthreads/images/graemlins/grin.gif