don't know ...
the number 8 appears quite often as if it was some sort of separator...
If I builded a LED message fan I would use an EEPROM for:
- text => the codes don't imply ASCII as ASCII characters are all below 128 - http://www.asciitable.com/
- timing information when to put LEDS ON/OFF => difficult to verify
- Font information?
The latter can be tested by writing the byte's in binary format as 1's and 0's under each other
How many leds are there on the LEDfan?
This might be an indication of the font size (7 leds => 7x8 fontsize)
For the rest I can't think of anything.