Correction:
BTW, I made typo.
300W/130V = 2.3A, 130V/2.3A = 56 Ohms, 56 Ohms/10 = 5.6 Ohms (3.73 Ohms if 15 is used).
300W 130V incandescent lamp will have hot resistance of around 300W/130V = 2.30 Ohms, the cold resistance will be about 2.30/15 = 0.15 Ohms, you can verify that by using your...