Probably no reason for concern. The bog-standard germicidal lights emit UV at 254 nm, but to generate ozone you'd need vacuum UV at 189 nm. You'd expect this to

Probably no reason for concern. The bog-standard germicidal lights emit UV at 254 nm, but to generate ozone you'd need vacuum UV at 189 nm. You'd expect this to be filtered out, precisely because of the health hazard. That said, I'd be concerned around photocopiers. If you can smell ozone it's definitely above occupational exposure threshold. In a previous workplace I kept telling our secretary just that, but she wouldn't listen.