Sentence 1: Tom's window let a lot of light into his bedroom. 
 Sentence 3: Eventually Tom decided to buy thicker curtains 
 Sentence 4:  He got some specifically made to block out light 
 Sentence 5:  After that Tom was able to sleep much better 
 Option 1: The light hits him right in the face while he tries to sleep. 
 Option 2: He loved the light.