If you want to create a light, such as a flashlight, being held by an actor, you don't have to adjust the transform data key after key if the actor moves away. All you need to do is to link the spotlight onto the flashlight in the actor's hand.
Go to the Scene Manger, click on one idle light under Dir./Spotlight.
In the Stage/Light/Modify page, go to the Light Setting section.
Select Spotlight.
Go to the Linkage section and click Pick Parent button.
Click on the target object you want the spotlight to link to.
Move the parent of the Spotlight to view the result.