import bpy

for lamp in bpy.data.lamps:
    print('+++ begin +++')

    print('name = ', lamp.name)
    print('type = ', lamp.type)
    if lamp.type == 'POINT':
        scale_vector = bpy.data.objects[lamp.name].scale.copy()
        print('scale = ', scale_vector)
        scale_vector[0] = 1/scale_vector[0]
        scale_vector[1] = 1/scale_vector[2]
        scale_vector[2] = 1/scale_vector[2]
        print('normalized scale = ', scale_vector)

    print('+++ end +++\n')