Is there a way to stop being a light sleeper?  

Have you tried some herbal relief? Valerian root works well for me. It is a natural muscle relaxer and has no side effects. You might try other things too like sleeping with a small fan on. The constant hum of the motor sometimes helps drown out the other little noises that might be waking you. Also, try exercise, sometimes it actually helps you sleep!

Well I guess you are sensitive to some noise or even light, you are just like me that really sensitive to the noise. Once I heard someone talk or my phone beeps or vibrate, I easily get up and sometime it is hard for me to go back to sleep. I think if you are light sleeper in the night, much better for you not to sleep in the day or even take a nap because it will give you hard times to go to sleep or try drinking lukewarm milk before going to sleep. Don't risk your life with a sleeping pill, try the natural way of sleeping. Good Luck!

just have any warm drink before sleeping....that will help you...

Make sure your room is clean, dark and slightly cool.

in my case, I sleep a lot :) but I wake up if there are disturbances but I sleep fast.. :) but I hardly wake up in the morning, its just that I love sleeping...