Your snake does NOT need UV light.
Do not stick the uth to anything. Instead cover the sticky part with aluminum foil and then tape it to the bottom of the tank(outside the tank). This will allow you to easily remove it for cleaning or changing tanks.
Do NOT, I repeat, Do NOT use the uth WITHOUT a thermostat. The results will be a burned snake with a possibility of large vet bills or even death.
A heat lamp can be used alone until you have a proper tstat. Depending on the temps in the room you may find you need both.
I like Herpstats and have four of them. When you buy cheap you get cheap. Do it right the first time and get a quality tstat.
http://spyderrobotics.com/home/products.html
Many people also use these and speak very well of them.
http://www.reptilebasics.com/thermostats
Buy the best you can. A good one will last you many many years.