Lots of aspects to this.
On the plus side if Ballance can't play we will at least have Root and Bairstow back as decent batting cover.
It's a trial and there is due to be a day/night test in England and in the Ashes in Australia.
If Ballance can't play with a pink ball it might rightly or wrongly affect his suitability for selection for the Ashes party. It might turn out that he isn't the only one who has trouble.
All teams will be subjected to the same conditions, so it may be silly, but it's fair. I doubt it will bring any advantages to us but it might bring in some after work spectators.
Yes I know it's never really going to get dark enough at that time of year and I hope it's a one off.
We must remember also that the club were very keen to stage a day night CC match when first muted by the ECB before everybody got one.