You can't light changes? What do you mean?

I would either change it from day to night or teleport. Or I would gain more general dream awareness in dreams. The fact that it is scary to you shows that you know that it is a dream, but don't know that that means that the sun isn't going to kill you and torture you (hopefully not). Just a little more general dream awareness can be gotten from anything that increases recall or from inside the dream, slowing down and thinking about what is happening and what this means is happening.