Hii , First of All Merry Christmas to you All. I am programming DALI Gateway for the first time.This installation is for a 7 storey building . Each floor having 2 C-Bus networks with atleast 15 dali ballasts for each floor. Reading all the previous threads made me play safe with number of DALI ballasts being connected to each network of DALI gateway. The Problem starts when i begin programming. Do i need to program(address) the Philips DALI ballast first with the philips software (MULTIDIM)provided. I tried washing my Hands:cool: for addressing the ballast with this software. But found cannot change the address anywhere as the ballast takes a random address in the software. .:( So went ahead with my C-Bus DALI gateway programming. Found that by default it takes 1st ballast as Ballast 0 and 2nd as Ballast 1 and so on. Now got confused here. Do i really need to address my ballast. If not... Can there be some problems in the future ? Can i get some kind of documentation for addressing and programming the same. Please Help Regards, Anupam