Fukushima Daiichi's Strange Lighting Yesterday and Today and Speculation About Plant Conditions

Yesterday I noted a strange light/reflection at Fukushima Daiichi. I have no idea whether TEPCO has simply installed a new light that produces new glare that is visible on the webcams, OR whether the strange lighting effect is symptomatic of some other phenomena.

My guess is the former explanation. However, as a "webcam watcher" I make note of any unusual activities and let viewers come to their own conclusions.

Here are two screenshots showing the new illumination: