I recently upgraded my camera to an Oly EPL3 with Oly housing.
While I could get my original Ring of Light to work with it, it was not perfect. It was too small to fit around the lens barrel and too big to sit it front of it not to mention adding considerable weight to the system.
So I have started on the MKII version.
Same basic principles. Just a smaller design.
I have not got the LED's yet but will probably be XPG's on 10mm stars. Either 8 driven at full power or 16 driven at reduced power.
The original Ring of Light is now up for sale. Battery pack not included. Make me an offer or I may have to pull it apart for the LED's.