A Light Note is the perfect way to stay connected to the blockchain without having to store the complete copy. By only storing the block headers, light nodes can be run on devices with limited memory resources, such as smartphones. Light nodes are dependent on full nodes to run, but they provide a valuable service by keeping everyone connected.A light note is like a thin client in that it doesn't store the complete copy of the blockchain. It only stores the block headers (and not block transactions). This makes it possible to run light nodes on devices with limited memory resources, such as smartphones. However, light nodes are dependent on full nodes to function properly.