A good example would be the Omnidirectional bulb from the generic fixture library, where you can set values to a variety of fields (Selected Items Properties menu) such as:
1. Choose 1 of the 19 available Modes
2. Set the desired diameter of the bulb
3. Set the Luminous flux values of the bulb
4. Set the desired Colour Temperature
along with all other properties that are available on most of the fixtures (e.g. enable/disable the throw light effect...)