I’m not sure we mean the same thing by “lamp post“ then as 120 lm is quite dim, The equivalent of about a 13 W night light, and is typically used for path lighting of the following type:
You usually need four or five of these at least along the path, and they aren’t the kind of thing you would use to aluminate a seating area.
In contrast, lighting for a driveway is typically around 1200-1800 lm. (This picture is of a fixture with two 600 lm bulbs)
I’m aware there’s a Home Depot lighting FAQ that says lamp posts are typically 120 to 180 lm, but they are talking about the kind of path lights like in the first picture above.
If you Look at their full-size lamp posts, which are more typically the ones people would put next to a seating area, those have 100 W equivalent lights which are over 800 lm.
