Quote Originally Posted by DLLNP View Post
Keep in mind— I am not necessarily referring to basking in direct, open sunlight (although my snake does tend to do that). The key with my video is that the heat we feel from the sun is comprised of infrared A & B wavelengths, heat mats/tape only produces infrared C wavelengths which carry much less energy. IRA and IRB penetrate deep into body tissue (organs, muscles, etc) and provide a healing effect and energy that IRC sources cannot. IRC wave do not make it through the dermis layer.
Quote Originally Posted by DLLNP View Post

Halogen bulbs produce IRA and IRB, therefore provides the animal with a closer representation of the heat felt via sunlight. The animal does not have to bask openly under the bulb, any area that is warmed directly via the bulb (through radiation not conduction) will be surrounded by IRA/B waves and in turn bombard the reptiles body. For example, the snake could still choose to be in a hidden in thick, dark brush and still be exposed to IRA/B. Visually all IR wavelengths are invisible, so it's less about the light that the bulb produces and more about the type of heat it produces alongside the light.

And in this particular set up, the python does have a heat mat at the bottom of his enclosure in a dark hide so he still has the choice. Typically, this particular snake spends most of the day in his dark hide (which depending on the time of day has access to a heat mat) but climbs to the top around 5 PM most days to bask under the halogen/UVB until the lights turn out. Of course this is just an anecdotal example.
Here's the thing (and clearly you have put enough thought into this that my next statement is not something you have missed but I'll say it anyway)...The temperature 'received' or felt by the snake is not the same while hidden in thick, dark brush as it is while in direct light of the bulb...exposed to IRA/B or not (within the short distances of an enclosure). You can measure this with a ir thermometer or just feel it with your hand. Meaning, if the snake needs 'X' temperature it will use what is available.

Your set-up may be ideal for a carpet python. It makes perfect sense that a nocturnal snake would seek heat to elevate its temperature before going about the nightly routine. It does not, however, prove to be the python's choice unless the options were different. -More natural doesn't necessarily mean better.

I'm not trying to poo-poo on your project...on the contrary, I applaud your level of research and effort. I would be very interested if you recorded the temps your python achieved before lights out and the choices made within the stratification of heat within the enclosure. Of even greater interest to me would be replication of those temps without the use of lights to gauge reactions...not easy to do without being able to control the climate in the room and very time consuming. I did this during the late 90's and early 00's with boa constrictors by types of heat, light and placement of the those sources. Even so, (as you say) without total control the evidence is somewhat anecdotal but that combined with research and observation in the field convinced me most snakes prefer to avoid the light if they can.