This is a Minecraft torch holder sized for the Mojang-endorsed "torch". It mounts to vertical surfaces with 3M "Command" adhesive very nicely (and is thus removable!) or you could use doublesided foam squares.

I printed this one in brown PLA; use woodgrain PLA if you have it and can print it. There's a notch in the front so you can operate the switch without removing the torch from the holder.