Dark rooms

Hi All, I may have posted about this before but wanted to bring it back up because it's a very common occurance for me. I dream about a House with multiple floors. I go upstairs and check out the rooms etc, as I continue to go up the floors become darker and darker. In the past I've continued up only to be greeted with something very scary like the character death. I was lucid last night in the same situation, I asked a DC what was up the dark stairway and they said not to go any further. I took their advice. Does this happen to you? How do you handle it? I've tried the light switch but it only illuminates a little. Thanks.