Moving into darkness

Here's an update from my watercolor adventures. Hoooo, how did I forget what happens when you try to depict a night scene with a naturally light medium? Layers and layers and layers and layers of paint later, here is where we stand:

This is the current stage of work. Everything is presumably working OK, but the light level is for a "Hollywood night" scene. We're getting to a scary point of the darkening: When do I cross the line that divides "suitably dark" and "loss of detail dark"? I mean, this is a big bright full moon night no matter what, simply because it'd be a silhouette against a night sky otherwise - but how bright am I making this moon? (The stars in the sky will be added using colored pencil or gouache, if you were wondering.)

Basically, I'm hoping this post is a normal process post and not a "where things went wrong" milestone.

EDIT: I sucked it up and pressed forward. Here is a piece I'm pretty happy with:

I color corrected this one to match the actual piece on my Photoshopping monitor, but I know from checking this blog out on my Macbook that screen brightness counts - especially in a piece that's reliant on brightness. Newer screens are probably showing this as lighter than it actually is, but I hope it's close enough for you all to get a sense of the level of light I aimed for.