Welcome to BikeForums.
That's a pretty good commute. Mine is 14+ miles one way.
I use two NiteRider lights (2001 NiteOwl II, 10W each). The batteries last about 2.25 hours. You'll need a light (or lights) with long lasting batteries for a 13+ mile commute.
http://www.niterider.com/
I have two Vistalite Super Nebula 5 taillights. Couldn't find their website, but they are sold at most bike shops. Here's some info about them.
http://www.touringcyclist.com/gear/model_7627.html
More good information can be found here.
http://www.biketowork.com/
Good luck.
__________________
The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.