what i have to use to only allow voltages above certin value to pass?
This is a possible solution. As Passerby stated comparators (or op amps) could be used.

If the voltage (from the battery) is more than the voltage at the minus-pin on the comparator then there is positive output from the comparator (i.e the voltage "passes").

The voltage at the minus-pin of the comparators can be constructed with simple voltage dividers.

The XORs at the end makes sure that only one lights up at a time.

This solution needs an external voltage source of at least 12V to power the comparators, XORs and also create the voltage dividers connected to the minus-pins of the comparators.