Lima is 2 hours behind Brasília
Best overlap: 10:00 AM to 6:00 PM in Brasília is 8:00 AM to 4:00 PM in Lima.
The overlap falls at 10:00 AM to 6:00 PM in Brasília, or 8:00 AM to 4:00 PM if you're in Lima. With 8 hours in common, treat scheduling almost as if the two cities were in the same region.