terrybright
Newly Enlightened
For me there are two criteria. I need a fairly dim "white" light for the passenger to read maps at night. I hate turning on the dome light when I am driving at night - I even think that it impairs vision of the road and is, therefore, mildly dangerous. I also need a bright light for reading street signs house numbers, dealing with emergencies, etc. I have found that a single light, the Streamlight Twin task, suffices for both of these purposes.