WashingtonLED headlights compound three effects into worse glare.
Blue-heavy spectra, tiny intense emitters and SUV lamps sitting at sedan eye level combine; glare is measured at one lab point, not a real driver’s recovery time.
Adaptive beam-shaping headlights, standard in Europe for a decade, only gained a US rule in 2022 that manufacturers call unworkable.
Sources: Ars Technica