Selaphobia is fear of flashes of light but I don't know about a fear of light in general.
buck is afraid of the man with the club
Call someone you trust to help you.
A person that is afraid of the dark has a nyctophobia
Phobiactic.
From what I understand there is no specific phobia for people who are afraid of mail. Most just call it Mail Phobia...
When a dog is afraid of lighting it is called a noise phobia.
Because they are afraid
Trypanophobics.
Insecure
Socialized
Acrophobic
Lintophobic.