Equilibrium stacks with Equinox's passive ability, which converts 10% of Health Orbs into Energy and vice versa, up to a total of 120% efficiency.
Equipping a Companion that is prone to taking damage, such as Kubrows or Djinn, will enable Health Orbs to be collected even if the Warframe itself is at maximum health, allowing them to be converted into energy more readily.
When originally released, Equilibrium at maximum rank gave a flat +22 Health/Energy from the respective Orbs, regardless of the amount of Energy/Health picked up. This was later changed in Hotfix 9.7.3.
The Orbs in the mod picture show the pre-Update 16.0 Health and Energy Orb designs, which were simpler and not as animated as they are now.