I understand that more watts in a lamp more deeper the light can go, but what happen is for example you have two lamps with the same power (96 watts) but one is 20 inches and the other is 15 inches.
Or if you have flourecent lamp A (96 watt, 20 inches long) and fluorescent lamp B (65 watt, 10 inches long)
Or if you have flourecent lamp A (96 watt, 20 inches long) and fluorescent lamp B (65 watt, 10 inches long)