I have been looking around for a decent edc flashlight for work. I understand that lumens is a unit of measurement, but, dont really understand it. Is 300 lumens 3x brighter than 100?? I want to be able to see well enough to Identify small parts laying on the floor at the back of the cure oven. The oven is about 50 foot deep. I currently have a 2aa minmag type light and its just not doing the job, aside from being too long to comfortably carry iny front pocket its just not bright enough. Attached is a pic of the light I now carry, the sharpie is for size reference. Suggestions??