Brasília is 2 hours ahead of Lima
Best overlap: 8:00 AM to 4:00 PM in Lima is 10:00 AM to 6:00 PM in Brasília.
Both offices are open during 8:00 AM to 4:00 PM Lima time, which is 10:00 AM to 6:00 PM in Brasília. The 2-hour gap barely gets in the way — you've got 8 hours of overlap, so pick whatever time fits the agenda.