I would like to use VTScadaLight to send process data to an OPC UA server so that other OPC UA compliant programs can have access to that data.

Does VTSLight support this functionality or do I require a fully licensed version of VTS?

If VTSLight does support this functionality is there documentation that describes how to configure it appropriately.

You can do it in VTScadaLight.

Here is where to start: https://www.vtscada.com/help/Content/D_DataSharing/D_OPCUASupport.htm?tocpath=Use%20VTScada%7CTags%20and%20I%2FO%7COPC%20Configuration%7C_____1

Note you can also get content related help at any time in VTScada by pressing F1.

You need to use Analog Control and/or Digital Control Tags.