Not Lexus quality but projectors shouldn’t have hot spots. That is a huge sign of crap manufacturing.
The stock halogens are way better then these.
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They may be better at projecting output, but they make hid bulbs look like shit. I had 4300k hid bulbs on the stock halogen projectors and they looked yellow, then I put 5000k bulbs and still yellow, just slightly less yellowish. These bulbs were decent from xenondepot. You could put bulbs from the beloved and overrated morimoto and they would still look as yellow. You can even put osram bulbs on there and they wouldn't look as advertised.
It was only when I put the 5000k bulbs on the chinese headlights that they actually look like real hid. Nothing changed, same hid kit and ballasts, but different headlights. You want everything, then you either spend a lot money on retrofit or buy a new car with real hid projector headlights.
Now here is another problem, you may do a retrofit with "quality" materials such Lexus projectors, osram bulbs and the such, which you can buy online, many retrofitters do this, rx350 projector is the most popular, this is cooland dandy, but just because you use similar materials used by oem manufacturers doesn't guarantee your retrofit will be as good as oem projector headlights like stock mazda 6 gt let alone a Lexus
All the headlights components from the smallest to largest plays a role in everything. You using some of the material (lexus projectos, similar bulbs used by oem, etc) doesn't guarantee it will be as good. First of all, most retrofitters are doing the retrofit on lower trim headlights of their car, which is inferior to the higher trim version of those same headlights in every aspect
Second, they will have to use an HID kit and unless you plan on buying a denso ballasts for your headlight, it will never even come close, morimoto, xenon depot? they're ok but trash in comparison to denso which is what oem manufacturers use in their cars
the ballast alone are probably the same cost of these chinese headlights lmao
and you better believe ballasts play a big role in headlights output and everything
moral of the story, buy the higher trim rather than chasing the impossible lol