Hey again @judgejames!
You will probably want to rename those. Maybe “Light Index” and “Light Power Array”. You definitely NEVER want variables to have the same name.
You’ll want to use the node “SetArrayElem”.
You’ll GET “CheckLight(bool array)”, pass that into the array pin.
Then GET “CheckLight(integer)” and pass that into the index pin. That tells the array which bool to switch.
Then on the final pin it will be a checkbox, so you can set it true or set it false.
After doing the SetArrayElem, SET “Checklight(bool Array)” 