Comment by js2

I had that thought too when I saw the parent comment earlier, but then I looked up the Morse code digits and I have to admit that they are much easier to decode from a flashing light than binary and I'm pretty good doing binary in my head:

    ----- 0000
    .---- 0001
    ..--- 0010
    ...-- 0011
    ....- 0100
    ..... 0101
    -.... 0110
    --... 0111
    ---.. 1000
    ----. 1001

Also, if I see a light with short and long blinks and a pause in between, I'm going to immediately think Morse, not binary, and decoding it is almost intuitive.