Yeah, I've notice there seems to be heaps of version out there, from just the one verse, to added verses and different ones... I found the one you were talking about online Mia:
I see the moon
The moon sees me
Under the shade of the old oak tree
Please let the light that shines on me
Shine on the one I love.
Over the mountains
Over the sea
Back where my heart is longing to be
Please let the light that shines on me
Shine on the one I love.