Hey Fengzi,Have you seen the new halogen lights?
as far as hood you are right,salt has a may of working into every crevious and expanding.Most canopy's are pressed wood bad for saly water.
The books Fengzi mentioned are great books & you should pick 1 up cause we are just tapping what you need to know.
I'm sure we all will answer any ?'s you mite have,but what about the ?'s you dont know to ask?