This is still just in days or half days (I am constructing an experiment for the spring to try to measure this in hours and on more cells and on both large and small cells and both workers and drones).
The queen in my observation hive layed these eggs on morning of Monday the 15th of December. They were capped by the morning of Tuesday the 23st of December (8 days). The first of these emerged by the morning of Saturday January the 3rd and the last by Saturday night Januray the 3rd. This is a post capping time of 11 to 11 1/2 days. This is a total time from egg to emerged bee of 19 to 19 1/2 days as opposed to the "norm" for large bees of 21 days.