a sleep experiment

I heard a sleep expert on TV the other morning giving tips on how to improve one's sleep experience.  Among other ideas, she suggested that the bedroom should be completely dark or a person should wear a sleep mask to block out the light. As I looked around my bedroom I realized that there are several little lights - my digital alarm clock, the control for my electric blanket, the power light on my phone and more.  I really don't want to disconnect all of these items every night so I decided to try the sleep mask idea. I happen to own several sleep masks since they pass them out on overnight flights so I've used one for the last three nights and, what do you know, I really do seem to be sleeping deeper. I've also been sleeping longer. That pesky early morning sunshine doesn't bother me at all.  Now if I could just train the geese not to honk until after 8:30. Are ear plugs next?