As some are aware, I build custom acoustic guitars and am in need of a custom light to place inside guitars to check structural integrity and a worklight when extended repairs are needed. The light I need must meet the following requiremnets. 1) It must be small enough to fit in the sound hole of a guitar with the strings on so as for as a size I will say roughly 2" wide by 1.5" high. length is not so limited but should remain with in say 3" or less. 2) Operating temp of the light must be cool as possible heat will cause glue seperation in the instrument so this a major issue. 3) Bright, Light will be used as a work light so as much as possible is needed. 4) Battery operated so I can place it where needed while I work with extended run times. 5)360 degrees of light...Ok how about close. 6) Durable I will be using tools as will most likley bump into the light fairy often. I don't want to blow a bulb everytime I bump it. Well that just about does it. I have thought about maybe a flouresent tube but not sure how or if it will work any ideas form the brain trust