179 chars:
sub led{
  ($b=pop)=~y/0-9.\-\0-~/\0-\cK/d;
  join$/,
    map{join$",
         ($"x4,'X   ','   X','X  X','X'x4)[(/./g)[unpack'C*',$b]]
       }424434444400,
       (322231123300)x2,
        324444424404,
       (321222323200)x2,
       (424x4)-4,""
}


print led @ARGV ? shift : "19QQ86\t-- \@0134.72x-0(?)";

[download]
(Using hex conversion for the string (and to delete unwanted characters! ) and an array slice of an array slice to generate the lines.)

(Change the trailing ' ~ ' to a ' ÿ '(" ÿaut "?) to reject 8-bit chars too -- I wasn't sure how it would travel inside code tags.)

update:  or 172 chars w/o argument checking and putting the '-' first:
($b=pop)=~y/-0-9./\0-\cK/;join$/,
map{join$",('X   ',$"x4,'   X','X  X','X'x4)[(/./g)[unpack'C*',$b]]}
142443444441,(132223002331)x2,432444442441,(132022232321)x2,1 .424x4
,""

[download]
  p

In reply to Re: (Golf) LED Sign by petral
in thread (Golf) LED Sign by tadman

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