I can speak about numerology lucky numbers. Other types of lucky numbers are outside the realm of my expertise.

There are only two numerology 4-digit lucky numbers:

1. The person's year of birth.
2. The number resulting when the day of birth, month of birth, and year of birth numbers are added together.

The latter is considered the most powerful of the two and is the 4-digit lucky number calculated at the Numerology Lucky Numbers Tool.