On the Subject of Cacti's Conundrum

What a prickly conundrum.

Hello friends, welcome to my conundrum! Hope you know your binary!

How to solve

• Convert the four black and white LEDs into binary.
  • A white LED is a 1, a black LED is a 0.
• You need the color of the colored LED.
  Colors include blue, lime, orange and red.
• You also need the binary converted to decimal. The intersection of the color and binary in the table tells you which button to press.
• The 3 bars represent the 3 stages of the module.
• If you don’t know binary, here’s how it works:
  • Start with the number 0.
  • If the rightmost LED is white, add 1.
  • If the LED to the left of that is white, add 2.
  • If the LED to the left of that is white, add 4.
  • If the LED to the left of that is white, add 8.

Answer table

Number	Blue	Lime	Orange	Red
0	Jeeves	Chicken	Shark	Chicken
1	Chicken	Hammer	Cactus	Hammer
2	Spoon	Jeeves	Hammer	Jeeves
3	Chicken	Spoon	Spoon	Cactus
4	Spoon	Chicken	Hammer	Shark
5	Cactus	Chicken	Jeeves	Cactus
6	Hammer	Shark	Spoon	Jeeves
7	Cactus	Spoon	Jeeves	Chicken
8	Chicken	Hammer	Shark	Hammer
9	Shark	Shark	Cactus	Shark
10	Jeeves	Chicken	Chicken	Cactus
11	Cactus	Spoon	Hammer	Shark
12	Hammer	Jeeves	Spoon	Jeeves
13	Shark	Cactus	Shark	Hammer
14	Jeeves	Chicken	Chicken	Spoon
15	Hammer	Jeeves	Cactus	Spoon