Marysunshine:
That's a simple idea but I haven't seen it done in any hotels. What we need is a flip-up mirror hidden in the drawer of the work desk by the window. If the desk is on castors that's even better. The desk lamp must have a high stem or adjustable head, with minimum 40 footcandle on desk top.
Some hotels provide a small make-up table outside the bathroom. The lighting is not particularly good. And it's a toe-killer for your midnight bathroom trips.