What are the advantages of these?
As 454cid said, the light pattern is superior, akin to a European E-code reflector.
They're OEM quality as well.
I've had both TYC and APC low-cost aftermarker units and in my case their headlight pattern was poor (blotches of light here and there), they didn't fit very well (the brackets wouldn't fit to the radiator support properly because of poor tolerances in manufacturing, so I had to use brackets from another set), they would accumulate water in rainy weather (so I had to pull the bulbs to help them dry), and they had no vent tubes like OEM... and those are just the downsides I can think of offhand.
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