The flashing beacon bulb in my AA1A is 100 watt. The one I received from chief is 125 watt will it work ok or will it blow something? and Thank You Richard Harrison for your last answer.
125 watts / 12 volts = 10.5 amps (rounded). The circuit is fused and the wire size supports 15 amps. The control box / switcher does just that, it switches the power to the light bulb on and off, and does not convert the voltage. You should be good.
I am thinking the last bulb I bought was also 125 watts, but it has been a number of years.