lz-source-value

The attribute lz-source-value is used to specify which property of the source element (specfied with the lz-source attribute) Leeze.js will use as the value of the reactive elements using linked to that source element.
If you don't use this attribute, the value property will be used by default.

As opposed to lz-source, lz-source-value must be specified on the source element and NOT on the reactive element.