Luminators are dim on ceiling

Hello

Currently using build 1.2.3 because I have to wait for RP2 to be ported but I noticed that when you place a Luminators on the ceiling it is really dim. If placed on the floor or wall, it is nice and bright. Ideas?

Also, the Luminator looks really cool placed on a wall. How can that be powered through a block? Lets say a stone block.

I have tried several ways. Mind telling me how? Thanks for your response.

Thank you for your reply.