Best for Car Travel

SOG Dark Energy 750A

Despite its diminutive size and weight (coming in just under 6 inches, and 5 oz), at full-power, this flashlight easily picked out an animal at the top of a 100-foot maple, and left a friend seeing spots for several minutes after we blinded him by accident. (Sorry about that, Fred.) But most importantly, it's great to store in your glove box for quick access if you get stranded and need to look under the hood. 
[$174; sogknives.com]