Do a search on the parts LM3914, LM3915, LM3916.
They are used to make LED meters often used for audio level. They are built to drive 10 LEDs but you can use only 3 outputs.
Make DC from your AC. (diode and cap) Then divide down to 5 volts.
Normally the LM391x is used like this.
LED1=.5 volts led2=1 led 3=1.5................led10=5
In the application there is a way to set the bottom led to non zero.
LED1=4.0, led2=4.1, led3=4.2......
In your case you could set the bottom led for <210 and the top led >250 with a total of 10 steps.