I think we all know it is a great idea to have lights on timers and even better random timers in our homes while we are away. However if you have lights connected to timers, make sure you put in new light bulbs before you leave on vacation. That way, they'll definitely come on when they're supposed to. Save the older light bulbs and use them when you're home.
Yes, even if the bulbs are working this tip will ensure that they are less likely to blow while you are away.