This guide will tell you where to find the Sunlight and Moonlight threshcone. You have to follow the simple instructions below to get both of them.
Sunlight threshcone only spawn on earth during the day. You can pick them up by scanning them as you find them on the floor around the map.
The Moonlight threshcone spawn on earth but at night time when the day/night cycle rotates every couple hours or so.