The top dome over the bridge is opaque.  Here are a few screenshots from various episodes to illustrate that.  (By the way, that's an exterior light, not a view of the Bridge.)

![enter image description here][1]


![enter image description here][2]


![enter image description here][3]


  [1]: https://i.sstatic.net/qpSs5.jpg
  [2]: https://i.sstatic.net/uEfd2.jpg
  [3]: https://i.sstatic.net/FrtLB.jpg