Bath lighting

[Astraeus]

I was enjoying a good soak earlier when this struck me:

When you're in any water (bath or pool), there are light reflections on the ceiling which appear to 'dance' about. I find it really relaxing to sit back in the bath and watch these but they're very, very pale in my current bathroom. How do I accentuate them? Do they need to be lit through lights under the water? What is the best way to light a bath that you get these reflections clearly and pronounced?