Looks like he might mean auto levelers with non oem hid kits, which I wouldn't think would be possible?
Thats what i was thinking.. are the bulbs not the same?
NO - if you are simply using a HID kit; then the bulbs will have a different base to match the donor headlamp - usually a bodge-job H7 cap grafted onto a cheap Chinese inferior HID capsule. Not only will these produce a truely shyte beam pattern - they are highly illegal, and very dangerous to other road users.
Basically, if you fit a HID kit into a non-HID specific headlamp, your insurance will be voided, and if you are involved in an accident - even if it was NOT your fault - you will still be liable for the TOTAL claim of ALL parties (the other car driver; emergency services, highways, etc) - and these claims can well run into tens or even hundreds of thousands of pounds. As an example - a simple two car accident I was involved in many years ago - the total cost to the third party was over a quarter of a million quid. Is it really worth the risk.