With OpenHab 5.1 the Location Cards seem to also count semantic property Brightness as Lights. Typically I do have below items added per light to the locations:
- On/Off - Switch: Point→Switch→Light
- Color Temperature - Dimmer: Point→Control→ColorTemperature
- Brightness - Dimmer: Point→Control→Brightness
- Color - Color: Point→Control→Color
On/Off is always present, the others pending on the light type (dimmable, color, etc).
In previous versions, only items with semantic property Light are counted for the Light badge on the location card. This seems to have changed with 5.x where also items with semantic property Brightness are counted. This has now significantly increased the number of lights in my rooms 
Any ideas, how to revert to old behavior?
Merry X-Mas and Happy New Year
Michael