I carry a small 1 AA battery Nebo led flashlight most of the time. Fits if my shirt pocket without danger of falling out. Its just 3.75 inches long. Gave $8 for it at a local farm supply store.  It works great for those times when you need more light when working on equipment.


In my truck I carry a Led flashlight that came from Sam's Club.  It uses 3 AAA batteries and puts out 135 lumens.  Its very bright and will put ordinary lights to shame.  The batteries also last a long time.   Best part it was 2 for $25.  Sam's now has its big brother that uses 6 AAA batteries with a light output of 200 lumens for 2 @ $26.  That will me my next flashlight.