Not a grey area in regard to MOT regs. From the .Gov manual...
**Existing halogen headlamp units shouldn’t be converted to be used with HID bulbs. If such a conversion has been done, you must fail the headlamp**
Regarding the self leveling...
*Sometimes it isn't easy to determine if the self-levelling systems work. In such cases you should give the benefit of the doubt*
Obviously an individual tester may lack understanding of a particularly unusual model so may not be able to say for sure re the OE HID vs HID conversion... in which case they should not fail.
Re Zero's comment on the importance of bulb construction accuracy. On one test I read a major brand (Bosch I think) standard headlamp bulb pair were rated as highly overall as many of the uprated ones as their construction was such that their beam pattern and spread was perfect.
Also read that usually in the uprated ones only the better brands were made well enough for accuracy of beam pattern between a pair.
Last edited by: Fenlander on Tue 29 Jan 19 at 12:07
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