Please note LightCouch does not use Log4j or any particular implementation, it's up to the application to provide one.
If your application uses Log4j, then you should be able to set the log level in its configuration .properties file, default.ini is not the correct place to do so.
In case it worked for log file but not the console, then perhaps you need to define "ConsoleAppender" to tell Log4j how to treat console output.