Anything but IR
I was just sat at my computer thinking about thermoregulation (as you do) The blood inside your penis essentially acts as a heat-sync for any external rises in temperature. I can’t think of a situation outside of using IR light (where the light is actually stepping through the layers of tissue and penetrating collagen inside your unit) that could result in anything more than a minuscule and very short-lived rise in those core tissues.
Conclusion - get your IR lights back out.