Daishain’s 5e D&D Rules, Q&A, And Support The Protector. says...
So, are we setting up camp in this area?
If we are then, is there a plan for night watch?
If all those that do have nightvision, are not concerned, about camping for the night.
Then, expect the others, including Tazskan will be lighting up a torch, so they can also see, in the dark.
Tazskan, will take a watch, but will have a campfire, and the psuedodragon to aid him.