Aquattro may know a bit more than me
, so I hope he's wrong
Besides the fact you are going to do everything to try to get him to eat, have you thought about turning off that new light for a day or 2? Or dim them all a bunch? Or something like that anyway.
He looks otherwise very healthy.
I wish I could offer you better advice, but if I was in your shoes, I'd probably do some panicky, knee-jerky thing.
Good Luck