07-21-2016, 07:23 AM
Did this at my now old store, it has a downside to it. If you block certain chests like diamonds (adding dirt or stone in the slots to stop mass selling while having a few slots left for people to sell to you the lamp will always be on). So if you are going to do that you should not put a lamp or just do it anyway if your not fussed or dont let people sell to you.
IGN: Genocore