neb:

 

Another possibility, those look like Aliexpress test cards, it's possible the fault is in the cards and not the lamps.  If you're in Orkland I've got some QuantaDose test cards you're welcome to borrow as a backup test before you burn $100-200 on a lamp.

 

Thanks yes am in Auckland.  From watching youtube videos i was expecting some visible purple light to be emitted too, but there was just nothing.  (also the Alpine LED indicator was red, not green)

I won't be doing anything further till back from the holidays now, but yes would be keen on testing out other bulbs and test cards to confrim the diagnoisis.  Will send a DM, probably late Jan. Another possibily is that the UV controller box is faulty.