Brilliant energy is a type of energy associated with the Divination skill. It can be collected from Brilliant wisps randomly appearing during Dungeoneering at 80 Divination. Each harvest gives 9 Divination experience, and Brilliant memories can be converted to Brilliant energy for 1 experience, with the exact amount of energy per memory depending on your Divination level. Unlike the surface counterparts, these cannot be traded to other players.
Level
Conversion rate
80
2.85
81
3.06
82
3.28
83
3.49
84+
3.7
One brilliant memory and 5 brilliant energy can be converted for 43.7 experience. Enriched memories do not appear in Dungeoneering.
86 and 
80
50
Blue crab
