Looking for insight on how much area (east/west) lines cover

Hi!

I'm looking into my lines and reading up on them on astro.com. For some of my lines, it states "More beneficial on the west of the line.", does anyone know how far west this covers? I technically live 226 miles west from my Venus/AS line and wanted to know if I would feel the effects of it here, or do you have to be closer to the lines?