Step 1: Before or after a visit to the RA, head to the White Cube. It's two minutes away and entry is always free.
Step 2: Skip the ground floor iron sculptures and head down the stairs to the basement.
Step 3: Let your eyes adjust to the low light. Be patient and don't trip.
Step 4: Bask in the phosphorescent beauty that is the 'Breathing Room III' installation.