/*
     * Checks if the target object is in the list of objects lit by this light source
     * Activates if lit state has changed
     */
    void CheckForObject()
    {
        List <GameObject> litObjects = lightSource.GetLitObjects();

        bool lit = litObjects.Contains(targetObject);

        if (lit != targetIsLit)
        {
            targetIsLit = lit;
            ActivateTriggers(targetIsLit);
        }
    }