Incandescent energy is a type of divine energy gained through the Divination skill. It can be collected from Incandescent wisps, located south of the Poison Waste, at level 95 of Divination. Each harvest of an Incandescent wisp yields 24 Divination experience if an Enriched incandescent memory is harvested, and 12 Divination experience otherwise. Incandescent memories can be converted to Incandescent energy for 1 experience each, with the exact amount of energy per memory depending on your Divination level.
One incandescent memory and 5 incandescent energy can be converted for 56.2 experience, while one enriched incandescent memory and 10 energy can be converted for 112.5 experience.