Question : PHP/Mysql time

Hi,

How would you store an interval, e.g.
from 9:30 to 10:40

I have thought about two TIME fields, but I'm not sure how to add/get TIME fields from/to MySQL.
Maybe it's better to use two char(4) fields ?

Thank you for any ideas ...

Answer : PHP/Mysql time

User datetime field for this.

hope this helps
Addy