The sun provides our world and its inhabitants with heat through the terrestrial wavelengths of light termed as ‘Infra-Red-A’ and ‘Infra-Red-B’ but not directly with Infra-Red-C which is filtered out by the atmosphere. The terrestrial wavelengths of light are full of energy as the photons of light travel down into our world.

They are then available directly into an animal’s dermis where they will deliver energy naturally, we term this as being ‘bio-available’. Full-spectrum terrestrial daylight interacts with everything that it encounters and in ectothermic species such as reptiles it is within these wavelengths that they obtain the energy that they need to ‘function’.

Terrestrial wavelengths of IR are also reflected and stored within everything that they encounter. This energy can then be reflected directly or radiated back away into the ecosystem as Infra-Red-C, as heated air. As such everything that energy rich full-spectrum light touches should be thought of as a ‘black body’.