Light Shaft is an advanced track taking place on a rainy day. There is a shaft of sunlight coming down from the clouds. Bloons will start at the top of the light shaft, and come down it. They will then continue down the path on the ground, following it until it leaves the screen. Water towers can be placed on the clouds, but not the rain, as a raindrop is too small to fit a boat on! Land towers can only be placed on the ground, unless a Bubble or E.V.A. Suit is used.