It depends on what you mean by "together". You can have multiple units on the same hue hub. As far as making the strip longer there is an extension kit that you can plug into the end of the primary kit. If you have multiple primary units they can all be scened together, or set as multi colors which is pretty cool. I have three primary kits under three cabinets in the kitchen and it sets up multi colors under each cabinet. As the controller sets the whole strip, not just an individual led in the strip, an extension kit would be the same color/temp as the strip you extend.