Easy now!

Proceed with caution. 
A weird, and rather huge, and definitely unexplained source of very bright light has produced a strange optical phenomenon. 
The public is advised to take extreme care while venturing outdoors as it can be very painful for the eyes. 
The National Committee for the Creation of Head-Scratching Consultancy Groups is currently recruiting consultants with expertise in unexplained bright lights. Or a first cousin sitting on the NCCHSCG. 
Met Eireann predicts that the protective cover made of thick grey clouds should soon be back where it belongs, and we will soon be able to ditch the welder's helmets and other daytime Bono-shades.