Yellow path is a long, boring path for an hour or so before it turns left. The yellow glow seems to be growing stronger and the lightbulb friends seem pleased about it for some reason.

They find a room that's filled with golden light that travels upwards. If they decide to toss another peach in the room, it disappears like it was teleported out. One of the lightbulbs runs into the light as well, and the same thing happens.