LED Number Plate

[B17NKA]

When I was looking at putting after market Hid's in my car I did a little research and found an article where a man had wanted to do the same thing so he had found an article on a government website about the fitting of after market Hid's
He said he had found the mot failure would be Hid's fitted where you could see the bulb through the headlamp lens as apparently this alters the beam pattern
The other thing was if a car is fitted with oem Hid's it must have self levelling and washers and they must work
If they are fitted as an after market addition the bulbs must be behind the projector lens and if fitted with the levelling and washers they also must work,if these are not fitted then they will not affect the mot because they are not fitted to test ?
A mate of mine has just put them in his A6 with normal light lenses and side by side his is totally different to mine and will be a mot failure
Please correct me if iam wrong ?
Ps I will see if I can find the article again