I use this light almost daily in attics as a Nuisance Wildlife Controller. The fit is great. By having the batteries on the back the weight is more evenly distributed. This was a feature that originally interested me in this product. Unfortunately, the beam is not as bright as I would like it to be. I had a tough time on this site determining what bulb is the brightest. I know LED bulbs are basically useless for my situation since the light is so soft. I will try to see if I can find a brighter bulb replacement. Battery life is not an issue since I use rechargables.