A version of a forwarder, a Splunk Enterprise instance that forwards data to another Splunk Enterprise instance or to a third-party system.
A light forwarder has less of an impact on system resources because it does not have as much functionality as a heavy forwarder. You can configure a Splunk Enterprise instance as a light forwarder through the CLI or through Splunk Web.
Note: The light forwarder has been deprecated in Splunk Enterprise version 6.0.
For more information
In Forwarding Data: