Type /buy (item number) (amount) in the game chat to have that item dropped for you in the game.
Example: /buy 1000 2 will get you 2 Bandit Street Signs.
Make sure to check the ground after you run the command because the item will drop at your feet
and disappear if you don't pick it up.
Any lights or signs with lights are decoration only and cannot be powered or lit up by players.