LED Supply said:The White Osram Golden Dragon is rated at 21-39 Lumes, with 30 Lumens being the typical Light output according to the specification sheet. The Io Moon, ie a Nichia Jupiter on a PCD board, has a light output of up to 52 Lumens, but around 38 Lumens typical. The Maximum forward voltage drop, depending on Rank, is 3.6V or 4V for the Io Moons.