[Cazador]

Hmmm, I had the same thought as Roy. The literature I've read (written by snake-specialist veterinarians and others) says that unlike basking lizards, garters don't need UV lighting, particularily if they're supplemented with Vit B. I use full spectrum lights and IR heat bulbs, but my lights shine through the side of the glass or plastic, meaning the snakes aren't receiving the UV wavelengths.
Rick