Apple

I know that basic support questions are removed, but I have searched everywhere and not found a solution that works so please go easy on me, mods... I upgraded from 13 to 15 specifically for the always-on feature because I can't see that well and wanted to benefit from the large clock numbers on the nightstand. I have a Magsafe stand with a 7.5w charger. There is plenty of battery. No matter what I do, the clock display shuts off after 30 seconds to 2 minutes and it comes on only if it senses movement. Does anyone know exactly what combination of settings is required to get the clock display to stay on?