Its hard to know isnt it - sleep problems are so complex. I used to leave the curtains open when I went to bed as I thought that would help me get up earlier. Recently I discovered it was better to leave them closed and keep the room as dark as possible as I slept better. Also, instead of turning lights on whenever I go into a room I started using candles (I dont have dimmers) in the rooms I needed to go in and out of such as the bathroom - and this helps me sleep better too. I do blow them out when I go to bed though. You could use a torch too. My eyes adjust to the dark and I dont need light to find my way to the bathroom in the night. All in all there has been an improvement. Try small changes in lifestyle, diet, vitamins and see what happens.
