When the Nodes are installed outside the luminaire, a clear demarcation point is created between the Node and the luminaire. This is a great advantage both during the installation phase and in the case of having to make subsequent repairs for possible breakdowns. Besides that, the moment a controller is installed inside the luminaire, the electromagnetic compatibility (CE marking) and waterproofing (external antenna) certifications of the luminaire become invalid., making it necessary to re-certify the Node+Luminaire assembly. With external Nodes, this problem does not exist, since Node and luminaire separate certificates are perfectly valid.