Stellar Lumens are assets of Stellar network. Stellar is a payment infrastructure, which provides low-cost financial services. It is main sector is money exchange and the system is based on open-source protocol. As regards Lumen, it is a
cryptocurrency, like Bitcoin, and its shorthand is XLM. This currency is a modification of Ripple one. The basics where developed by Ripple, but some disagreements appeared in management team and Jed McCaleb, one of the founders, decided to create Stellar, his own company.It is easier and cheaper to mine Lumens, than other digital currencies, due to its innovative protocol "SCP" (Stellar Consensus Protocol).