Even though it is cheap Chinese garbage, I highly doubt the ballast failed (unless it is electronic).
My money would be on a loose connection or failed rocker switch.
Not so cheap in terms of money, it cost about AU$200+ (US$140ish) including the base and floor lamp extention.
It's been sent back to Superlux for repair or replacement, I'll ask them if they figured out what was wrong with it but I'm kind of expecting they wont look at it and might just send a replacement. If they tell what was wrong I'll report back.