I would say definitely not to space mountain. It is in total darkness almost the whole time, that's actually how it achieves the effect of seeming faster and more thrilling.
Rockin roller coaster is very short. It has lots of neon lights and things to look at but you're still surrounded bydarkness, so that might be a bit much for you!
Peter pan...I REALLY want to say you will be fine since its such a fantastic ride! You will see lots of illuminated scenes from the movie, very happy music. But its still a little darker than splash mountain. Its not lit up quite as much and there aren't any parts that go outside.
Everest I am almost certain you wiwill enjoy this ride! Its short with plenty of outdoor parts of the track and about as much if not less time spent in the dark as splash.
Haunted mansion definitely not. It is very dark and since it is themes like a haunted house they use the darkness for extra scary effects.
Dinosaur is loud and there's always something to look at! Lots of little up dinosaurs, but again its prettydark in there. Not sure about this one.
I think a good question to ask is what level of darkness can you handle and how much lighting is enough? Splash mountain's scenes are in dark tunnels but are lit up in such a way to emulate the lighting of a spring day outdoors. But rides like peter pan and dinosaur and spaceship earth have low lighting and "neon" lighting like this...
https://i.ytimg.com/vi/hWiRvoTamyc/maxresdefault.jpg
Is that enough lighting for you? Can you sleep with a night light on? A lot of dark rides are dimly lit like that