Hi,
IS 200t 2016 model here, HID headlights. When I purchased the car I was very unsatisfied with the lights at night, especially because I drive fast. So I have tried a couple of upgrades, and only when I got the Osram Nightbreaker Unlimited D4S, I was really happy and confident to drive fast as I like at night. Now there is the Osram Nightbreaker Laser version which should be a bit more powerful and whiter. What I wanted to share is that only with these light bulbs and clean headlights I am confident in driving fast at night. Stock bulbs are crap.