What do different runway depictions mean in the Chart Supplement? I cannot find a digital Chart Supplement (AF/D) glossary.

What is the length requirement to depict a runway as a dashed line vs. solid black?

The depiction for Melbourne, Florida shows one runway with a dashed line and another as solid.

At JFK, all the runways have dashed lines. What do the different depictions mean?
The glossary I'm looking at (page 13 from the current South Central US Chart Supplement) says that that style of dashed line indicates Runway Centerline Lighting.  So runways that have the dashed lines have lights on the runway.

The complete chart supplements are available online from the FAA, and the glossary for each one is easily found about Page 13 for each section.