“Let there be light!” (Or, in literal translation, the order, “Make light!”)
So, yes, this post is about sensory stuff. Specifically, visual sensory stuff, and living with people who aren’t as sensitive to light as I am.
Everyone needs light. We’re a diurnal species, meaning that we’re active in the daylight. There are very good reasons for that, involving the anatomical makeup of our eyes – namely, we (as a species) aren’t very good at seeing in the dark, and vision is our species’ primary sense.
More than that, we need a certain amount of sunlight to stay healthy. It helps our bodies produce Vitamin D, which helps with the absorption of calcium, and assists in preventing depression (or helping to mitigate it), to name just two benefits of sunlight.