A.
Move the tape lights towards the walls to prevent the wood (blue lines) from blocking the light -OR-
Put narrow pieces of wood under the tape lights to raise them up and prevent the wood from blocking the light -OR-
Mount the tape lights in channels (example) thick enough to prevent light from the being blocked by the wood.
B. Experiment with sliding the two tape lights away from the corner to eliminate the double brightness seen there.
-- amateur
Q
Good suggestions
Q