Thank you for posting in the Intel Community.
Allow me to investigate your question, I will be posting back as soon as possible.
Intel Customer Support Technician
We officially don't have this information documented, at least not in the way that you are asking for, energy consumption varies depending on correlation with the processor workload and this varies very much.
I would recommend that you check on third party websites such as this one: https://nucblog.net/2018/11/coffee-lake-i5-nuc-review-nuc8i5bek-nuc8i5beh/3/
I hope this helps,