If you install a OEM Honda spoiler,the 3rd brake light in the back window will no longer work because when you install the spoiler, you are unpluging the connector from the third brake light in the window and pluging it into the connector on the wire harness from the spoiler. When I had my windows tinted, I removed the third brake light from the back window before they tinted it, so they tinted the entire back window and now the unused third light is barely visible.

This is how it should look

I tried a mod where both brake light were on, but un did it because it looked stupid with two lights