Today’s conventional lighting control systems do not measure and control the relevant parameters but only horizontal illuminance, e.g. on floors or desktops. However, the human eye mainly detects objects (when standing and sitting) in the horizontal plane, which makes the vertical field of vision crucial to user comfort. The factors determining this are the luminance ratios, i.e. contrasts in the surroundings and on the screen, and glare from the façade. One study (C. Moosmann, 2015) shows that anti-glare systems are mainly utilized to control daylight and hardly at all to control the indoor temperature, which has disastrous consequences as far as the use of energy is concerned. Human Centric Lighting Control “HCL-Con” addresses this issue with a new approach.