New Super Mario Bros. U: Rock-Candy Mines-4 -- Light Blocks, Dark Tower

This is a dark level, with large light blocks that light up in sets. They also act as platforms. In the left item block is a Starman that lights up the entire level. Try to reach other item blocks to continue the chain of Starmen so you can see. Go up the wall on the right with the bats for the first Star Coin. Climb the rope ladders and go through the yellow pipe on the right side. This will take you outside, where there is plenty of light. Bounce off of the Parakoopas to get the second Star Coin. Return to the pipe to return to the main level. The green pipe at the top will take you to the midpoint. There's a ? Switch that turns on the light blocks temporarily. Keep an eye out for other ? Switches so you know where you can turn on the lights again. There's a pipe that makes an infinite amount of Bob-ombs. Go up the right side of the level past the Bob-omb pipe. There's a Fire Bro at the top of the level and the third Star Coin is above it. Take the pipe to the flagpole. This opens the path to Rock-Candy Mines-5.