"Basil Jet" wrote in message
...
Does anyone know what's going on in the former Arsenal stadium in this
picture?

Artificial 'sun' lighting to keep the grass growing when in the shade of the
stands.

Fairly common nowadays in the big stadia where the all round stands
initially led to the grass surface being absolutely useless for large parts
of the year, and led to re-turfing mid season at quite a few grounds.

Paul S