I have been on mirapex for a few years. I never associated the lights at night with it, but if they are related, I have that. I am on the same dosage as you are.

I also have the shadows, and experience other lights, too, but the shower of lights with subsequent dots and spiders are resultant from two vitreous detachments.

Another source of the lights is from visual migraines, which I also have, but these are easily discernable from the others. A small arc of bright light forms, and then over about ten minutes, the arc forms into a perfect circle and then disappears.

Hope that this helps,
mama