Light fantastic

When I looked out of the kitchen window this morning, I felt the sky was bluer than I had seen it for a long time. And, when I went outside later, I was very taken with the quality of the light. Then I read an interesting article in The Guardian, about how it is the light that is so important to our well-being in Spring. It was a detailed article about light and blue skies, explaining why the sky is blue anyway and why our sky is possibly more blue than others because we are high up. I was interested in how light can be measured in lux and how on a day like today the difference from inside to outside, measured in lux, can be astonishing. I am no scientist and I did not understand all of what was being said, but I am glad I noticed the blue and the light today.