The angular momentum of EM fields is directly given by
Angular momentum of EM fields
\[
{\boldsymbol l} = {\boldsymbol r} \times {\boldsymbol g}
= \varepsilon_0 ~{\boldsymbol r} \times
\left({\boldsymbol E} \times {\boldsymbol B}\right)
\tag{lrxg}\label{lrxg}
\]