In my opinion the lights on the Lexus IS 300H at night are fine. I have driven many cars with HID's and in the Lexus they are more than acceptable. Perhaps the older folk need to go to the opticians or considering reducing their driving at night !
We need to compare like with like.. There are many factors that make up a good light and not just whether the "bulb" is LED, HID or even Halogen! I suspect though that overall LED's are better - they should be, the technology is newer and continues to advance at quite a rate.
My take on LED's:
Unlike halogen bulbs, which use a filament that degrades over time, LEDs are simply semiconductors with no wear-and-tear parts. In theory, they should last the lifetime of the car.
LEDs also require less electricity than halogen bulbs, reducing CO2 emissions and drain on the battery. And the light produced by LEDs is much closer to daylight, making it easier on the eye and reducing glare.
The main disadvantages of LEDs are cost and heat dissipation. Because they don’t produce significant heat, LED headlight lenses are at risk of frosting over in winter – dramatically reducing light output.