  We give estimates for the zero loci of Bernstein-Sato ideals. An upper bound
is proved as a multivariate generalisation of the upper bound by Lichtin for
the roots of Bernstein-Sato polynomials. The lower bounds generalise the fact
that log-canonical thresholds, small jumping numbers of multiplier ideals, and
their real versions provide roots of Bernstein-Sato polynomials.
