I want to create a column that includes two different luminaires, mounted at different heights
In the LIGHTSMANAGER command dialog, it is possible to create any number of pre-set street light configurations. To create a lighting column with multiple brackets and luminaires you need to set the number of brackets – a property of the column. You can set the pre-set properties for ALL brackets and ALL luminaires, but currently not for each one individually. This must be done individually in the instances of the lighting columns once used (inserted) in your drawing.
You can also drag/drop and attach additional brackets and luminaires onto an existing street light in your drawing. Note that if the ‘Even bracket spacing’ property for a column is set to ‘true’ then as you drag additional brackets to connect to the column, the rotation of the bracket may change.
If you wish to use the symbol repetition or spacing commands, you should create a suitable arrangement, specifying the required properties, and then selecting the symbol for use with the command you need.