KMLabs Yi-Fi Laser Light Source for ARPES. This system uses high harmonic generation to access four excitation energies in the range of 7.2-10.8 eV with high intensity, while still maintaining energy resolution down to a few meV. This laser is attached to the cryogenic ARPES module equipped with a DA-30L spherical analyzer. Base pressure is 3 x 10^-10 mBar