As AbbyY said, you only access it by a sustained press from Off. Does your light not do this?
No, it doesn't. There seems to be no way to get moonlight mode working on mine. Not very happy about that because I thought that being able to get to moonlight directly from off was a rather nice feature. Also the light doesn't go to moonlight after beeing unlocked (Figure3, c. in the user manual). I'm using almost new Eneloops and Sanyo 2700, could there be something wrong with these ( both work well in all my other lights)?