I usually hunt until I can't see well enough to tell if the deer is legal or is really a doe (not a spike). After that, I tend to quietly get down and leave. Plus, I can generally see well enough to leave without using a flashlight that way.
Of course, I wear one (head lamp) for walking thru certain areas that might be "inhabited" (I hunt public) cause I don't want to get shot by someone who has better eyes than I do and stay in the tree much later (being clear. . I mean AFTER shooting time is over, I won't walk thru them during the last seconds of the day).
ChuckC