LUMEN system requirements state that you will need at least 8 GB of RAM. In terms of game file size, you will need at least 500 MB of free disk space available. An Intel Core i5-4590 CPU is required at a minimum to run LUMEN. Provided that you have at least an NVIDIA GeForce GTX 970 graphics card you can play the game.
LUMEN will run on PC system with 7, 8.1, 10 and upwards.