I'm fairly certain this is a Spotted Orb Weaver ( Neoscona crucifera ) spider. Its coloration and markings are truly striking!

Trying to get a macro shot in the dark was a challenge. You know it's humid out when a crisp piece of printer paper you take outside becomes flimsy and damp within the 10 minutes you are standing around taking pictures. You can actually see some droplets of moisture on the web.

This beautiful little spider has been hanging out on our back deck since February. It is nocturnal and sleeps in a tight ball in the corner of a support beam during the day, so it's been very difficult to get any good photos of it. This was one of the better images I managed to capture thus far.

I have a larger version available, if anyone thinks this would make a good print.