Feature request: Material "luminance" value linked to the parameter sheet

[spawnreaper]

Ive created a parameter in my sheet with no units just a value of 100.000. I thought I could go into the material and refer the luminance value to my parameter set value, but it seems not to be possible.

It would make it easier to adjust light levels in a project right in the parameter sheet instead of going into the appearance than finding the material to adjust, then going into the properties and changing it.

Might me a nice update?