Sometimes, when you see a figure moving in the dark….don't always assume its a bad guy and rush in to attack. It may be a fellow citizen. And if you are a caster or have friends who are casters then you could get a light spell from them if you are unsure of your footing along the paths. Though chances are if you have anything lit people will constantly yell at you to turn it off for one reason or another. Be it letting the enemy and creatures know your location or destroying their night vision. But if its just because of their night vision I say you tell them that you are being safe for yourself, and not to worry about them in that case.