Array options nodes not showing up

BP Ceiling Light is simply a blueprint and I also have several instances of the blue print on my scene (in total it’s 12 instances). My goal would be to create a variable that would be an array of all this instances (this being the variable I showcased, “Lights”). Maybe it would help if I showed the partion of the PDF I’m trying to follow (BP_IndoorLight is supposed to be my BP_CeilingLights and the BP_LightsButoon is supposed to be where I’m doing all of this).