Blender | Control multiple lights with one set of values

To “link” certain lights together in Blender, so they all share the same attributes simply shift select all of the lights you want to share the same attributes and then press ctrl + “L”. Next select “object data”. This will make it so all of the selected lights share the same light properties. So when you change the colour or intensity on one light, that change will be applied to all of the lights sharing data.