Final answer:
Low energy radiation emitted due to electrons jumping between closely spaced outer energy levels is generally infrared light or sometimes visible light.
Step-by-step explanation:
Electrons transitioning between outer energy levels that are closely spaced together emit radiation with comparatively low energy, which is typically in the form of infrared light or sometimes visible light if the energy is slightly higher. This type of light is lower in energy than, for instance, ultraviolet (UV) light which is emitted from higher energy transitions involving more distant levels. In the context of electromagnetic radiation, these photons possess longer wavelengths corresponding to the lower energy increments involved in such transitions.