I've tried some of the Enay ones, you'll find in a Landy they will P*** people off.
The problem is that normal headlights are reflector type. This is where the beam is focussed by the reflector being designed around the placement of the filament in the lamp, they're not very effective at getting a clean cut off for low beam, and let a high proportion of light go into the direction of oncoming traffic. That's not too bad with normal 60/55 lamps, but put approx 3x the light out as you do with HID, and that bit of light gets very nasty for oncoming traffic. Then allow for the fact Landy headlights are quite high compared to most cars, and you realise there's quite a bit of light to dazzle the oncoming drivers.
You may find the Osram +90% lamps are quite good at getting a much better headlight for driving but not being to bad for oncoming drivers.
BTW the cheap Ebay ones (which they nearly all are cheap-even if you pay a lot for them), tend to fail quickly due to poor manufacturing, so a et by a reputable maker (Hella, Bosch etc) is more cost effective in the long run. Also you should have either self leveling headlamps or self levelling suspension, and headlamp washers to be legal but the chance of getting picked up is probably quite low.
Andy
Andy