If you were to take a look around, I am sure you would see decorative lighting strung everywhere. Your concern is good to see, and as an EC your liability is always in the back of your mind. I would always go by gut instinct - sometimes losing a good job - but always sleeping well.
Your decision is really yours, as we cannot physically see these lights. If they are listed as outdoor rated, the hedge location could work, now you will have to make the final determination. Sorry this is not a pat answer, there are too many unseen variables for a yes or no answer.
