So, I was watching a re-run of CSI:Miami last night, and I was wondering why it is that when they portray CSI's investigating a scene the CSI's are always going over a crime scene with a flashlight in the dark. Why don't they turn the lights on? Aren't you going to miss something? How much can you see with a flashlight?!? It's the same on CSI and CSI:NY. Do real CSI's do this? Really, how powerful can that small flashlight be?