Here I have detailed what i’ve done inside my scene. Now, the shutters, in our case, that box in the left side has not been moved but I want to make a blueprint that will activate the shutters closing and reducing the exterior lighting from 1 to 0 in 2 seconds or so like in the pic with only one light active (0-in-indirect-lighting.jpg). That is my main issue, I hope the pic helps better understand what i’m trying to do.