Electronic – Automotive relay contact rating, Can it handle 120vac

To answer your question about whether a CCFL should be considered a 'ballast', I think not.

Very early CCFLs had inductive ballasts in them, however they were heavy and bulky and did not last long in the market once electronic ballasts became competitive. I think the rating applies to old-style reactance ballasts and not the modern-day electronic type.

It's not uncommon for the N.C. contact rating of a relay and/or the life to be considerably less than the N.O. contacts of the same relay.

Given that AC voltage is usually measured in RMS, that means the peak voltage you expect to see on your AC line is 60 * sqrt(2) ~= 84.85 V(peak). This is quite a bit higher than the rated 50V(dc) (peak is the same as given voltage for DC), and you could possibly damage the device and the rest of your circuit.

EDIT: I had a another look at the data sheet, and the issue you may run into is that if you select one of the options with a diode (called a freewheel diode, used to prevent reverse voltage spikes when the contacts are opened), it will cause issues as the diode will conduct when the AC voltage goes negative (even with the contacts open).

Also, I'm assuming you are using a DC control current with a AC load current