I wear sunglasses most of the time during the day, even when it's cloudy or raining. My light sensitivity has gotten better over the past few years, though. I used to have times when my light sensitivity was so bad I had to go find a windowless room to stay in with the lights out for 15-20 minutes. I haven't done that in several years. I used to wear sunglasses indoors, too. At one point I considered getting some new sunglasses that had just come out that were so dark the manufacturer warned that they should only be worn during bright sunny days on snow. I don't get too irritated by fluorescent lights. However, even when I can handle whatever light conditions I'm in, I always feel a sense of relief whenever I put my sunglasses on or go into a dark room.
I don't have any real sensitivities regarding sound, unless it's a really high-frequency noise. I do sometimes have issues understanding people if there is too much background noise, even if the person speaking is louder than the background noise. Air conditioning and computer servers are real bad for this.
I also have this thing sometimes where I hear someone speak, but there's a very brief delay in actually understanding what the person said. By the time I respond with, "What?" I've understood what was said. It doesn't happen all the time, though.