We found this place a couple of years back as we were on the hunt for serigraphs by Josh Agle. This gallery is located inside a book/toy/gift shop. They were the first gallery to show low brow artists like Josh Agle aka Shag.
There is no admission charge for their shows and sometimes the opening nights of certain artists can draw a huge crowd ie lines out the door. The staff at La Luz is always helpful. The owner, Billy Shire, is unassuming and walks around in a wife beater.
They have a website so their current show is available for view. This is a cool place to check out if you are in town.