How to protect the wood finish of speakers.

I am interested to know if there is a way to protect my Totem Mani2 (maple).

They need protection from the light... My living room is all glass on one side and the sun shines in in the afternoon... (actually shines on one speaker) PS. I live in Hawaii, so the sun shines all year...

Is there something that can be done to preserve / protect the wood finish?

Thanks