Hi David, I do similar to this on my HC2.   Set parameter 23 to 0, this turns off double click makes full brightness. Set parameter 28 to 1, to allow scene activation.   Then you need two LUA scenes.  The first is activated on single click, and makes your first light turn on. The second is activated on double click, and makes your second light turn on.   Here is my first scene, to get you started.  The second scene is very similar. d83d3bb84ebc7e89cbc721c791