Blender - Area Light Size of Multiple Area Lights

import bpy

# Get the selected objects
selected_objects = bpy.context.selected_objects

# Iterate through the selected objects
for obj in selected_objects:
    # Check if the object is a light
    if obj.type == 'LIGHT':
        # Multiply the radius size by 2
        light_data = obj.data
        light_data.shadow_soft_size *= 2

        # Alternatively, if you want to scale the size for area lights, you can do:
        if light_data.type == 'AREA':
            light_data.size *= 2
            light_data.size_y *= 2  # If using rectangular area lights

# Update the scene to reflect the changes
bpy.context.view_layer.update()