MySQL 5.5 - Innodb - innodb_log_file_size higher than 4GB combined?

Question

When reading online about innodb_log_file_size, it says

The combined size of the log files must be less than 4GB

So what happens if it needs to be larger?

In books and online, it says to set the innodb_log_file_size to at least an hour's worth of writes.

Currently I have 2x 1GB log files that when calculating Innodb_os_log_written for 1 hour, needs at least 10GB. 2GB of log files can only do 20 minutes of writes on our peak load.

tia!