14 lights in ~4.5 miles often makes a mockery of my commute (and Strava segment) times going in, I swear Southampton has a higher density of traffic lights than Liverpool had in the 80s! My best time is ~16.5 mins, when I had an amazing run through green lights.
I keep thinking I should try to commute in on the reverse of my home route to compare times, which I think has 7 traffic lights over ~4.2 miles (best time just under 20mins).
However, this also involves the railway crossing lottery (albeit I can carry the bike over the bridge) and means going up Rockstone Place hill.