click on thumb for a big picture
Here’s a pretty good example of light pollution:
This drawing was done from my moderately light polluted backyard
There are about 5 street lamps around my house
This drawing was done from my dark site 20 miles away

both of these are M22 found in Sagittarius.
as you can see the effects of pretty dramatic.

The town I live in is moderately sized about 35,000 so the light pollution is not horrendous as it is in large cities but it still bad enough to make a huge difference.