You get this pin by collecting a certain number of Lux Items. You can find them in the recycler or in the boxes (Carpenter). 

This is the amount you need:

Level	Collected
	3 Lux items
	10 Lux items
	30 Lux items
	75 Lux items
	250 Lux items

After reaching the 5th level, you can level this pin again with the same number. After that, the color no longer changes, but a number appears on the pin. This shows other users how many times you have reached the last level.

This is a lux item