Another way would be to make a global variable "TurnedOn".
-> Set "TurnedOn" to Sprite.UID //You can use an instance ID to select which one...
Mouse.On click Sprite
->Set "TurnedOn" to Sprite.UID
->Sprite Pick UID="TurnedOn"
-->Sprite Play LightUp animation
Then set up so any other time it plays the default animation