The Kraken Sports / Weefine ring light RING-3000 gives you 1800 lumens (continuously), or a burst of 3000 lumens triggered by a fibre optic cable. The light can be easily mounted on any 67mm port or adapter. The burn time is around 1 hour at the highest power level. The power comes from one 26650 battery. The battery (26650 lithium) is already supplied in the package and it comes with a small and easy to use charger.
Choose the optional 67 to 52 mm step down ring if you want to mount this light ring on a housing with a 52mm port such as the Olympus pt-059 for the Olympus TG-6.