Lighting leaks. Need help.

The entities themselves aren't leaking. You can delete every single entity save one, and then that will leak. VBSP determines the "inside" of a map using point entities, so leaks will always be "from" one of them.

Go to map > load pointfile, after a compile, and check the red line that's drawn.

Removing the lights is the wrong way to fix a leak. You need to close the gap in the brushwork that they're leaking through. Like Ardy said, you need to follow the red line to find it. Hiding all world details helps too.

Oh, also: AFAIK, prop_statics don't actually leak: they just throw an 'outside of map' error.