Went to pick up one of the company's planes from the paint shop and I had to fly it back to our main maintenance base at a nearby airport. This requires a very thorough preflight inspection and even though it's broad daylight and the plane is in a well lit hangar, I pulled out my edc of the day, an emisar D4vn and my copilot, a fairly new guy, asks what do I need that for? I just told him, watch and learn. The flashlight made it easier to find several minor details and a couple of not so minor ones. I then explained to him how a good flashlight can be a real help checking things out and even more so out in the open where your eyes are adapted to the bright light and that makes it harder to see anything that's in shadow. I think a new flashaholic has just been born as he immediately said that he wants to replace his cheap plastic light with something better. After a brief consultation we ended up ordering a fenix with a protected 18650 lithium cell and built in usb charger as a good starter light for him.