yup, you sure can remove the molex from a neon/cold cathode and hook it to a bay bus, just try and use only 12 volt for the light, i think it damages them if you lower the voltage too much.
digidocs are great, but after reading all the reviews i found they werent perfect. apparently the alarm goes off pretty often and the fans keep turning on and off.
id suggest a baybus, but thats my opinion.