>>other than uv does a basking lamp provide anything more than a regular light bulb (assuming the same wattage)?
Basking lights do NOT provide UVB, which is the rays that are needed by diurnal (daytime) reptiles. There are a few models out, such as PowerSun, that do also provide UVB, but they are $30 a bulb and only come in 100 watts and up - much too hot for the average ball python cage.
Basking lights provide much more heat compared to a regular light bulb. A light bulb is intended to provide light, not heat, so they are not going to heat up much. If you tinker with wattages with heat lights, you'll notice that the amount of light put out by different watts hardly changes...but the heat output sure does! Different watt levels provide different amounts of heat.
I hope you got the UTH and temp gauge in spite of what the guy at the petstore told you! What possible reason could they have to tell you NOT to know what temperature your reptile was living at?
The moonlight bulbs are awesome for viewing nocturnal reptiles with.
During my short-lived attempt (less than a month) of trying to keep my snakes in a display type setup, I never noticed them come out to bask like, say, my california kingsnake does.
A happy, healthy ball python is one you almost never see during the day. 
~jenny
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"Polysyllabism in no way insures that what you're saying is actually worth being heard." - Blake (an e-friend of mine)
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