I bought a set for my Alpharex projector lights. LEDs are notoriously poor in projectors. I originally bought Hikari Ultra and Katana for the alpharex, and while they had a perfect sharp cutoff and beam pattern, the distance projection was nonexistent. To the point that it felt dangerous driving at freeway speeds on dark backroads (which I travel every day to work), and even in the city with the ambient light (I live near Houston in a town with multiple refineries, it's never really dark outside). I installed these and they are leaps and bounds better than the Hikari and Katana, still with a perfect beam pattern and cutoff, but still not quite as good as HID. While I did not experience the same feeling of unsafe at speed, I still was not comfortable. I prefer a strong light source that projects fully to the cutoff, and LED in projectors just do not offer that. They still faded out, just a bit further in the distance. I relocated them to my high beams and put my 5500K HID with 45W ballasts back in the low beams. When I switch to high beams, they light up well, but the cutoff from the low beams is still plainly visible as the projection of light is just that much stronger.
If you live in an urban/city environment with a lot of ambient light, you should be fine as there is typically no problem seeing at night given all of the city lights. If you live in a more secluded area where you are relying on them to see hazards in the distance, I personally would recommend not using LED if you have projectors. If you have reflector headlights, cannot make any recommendations as I pulled my reflectors within a few months of owning the truck 5 years ago.
As for color temp, I would say they are definitely higher than 4500k visually, but far better and a bit warmer than typical LEDs. They are nowhere near as blueish as the Hikari or Katana, but nowhere near as warm as my 5500k 45W HID combo, which I estimate to be somewhere between 4500k-5000k due to the higher wattage.
