While driving at a snow storm (lake tahoe area, hwy 50), i had to stop every 10-15 minutes to clear my headlights, which were almost completely covered by snow. it was very dangerous. almost zero visibility, nowhere to stop safely... led headlights do no produce enough heat to melt the snow. lexus probably fixed it at 2018/2019 model years and used heating at the headlights. but older model years (2016, maybe also 2017) are very dangerous while driving at snow.