I bet they aren't. I bet you are just looking at the colour of the light and thinking 'wow', rather than how well they are actually illuminating objects in front of you.
Have a look:
http://www.britpart.com/parts/lighting/light-conversion-and-upgrades/lynx-eye/da6282/
It says they use Cree XML emitters. Which aren't even made anymore and are old tech. The replacement for the XM-L is almost ready for replacement.
It says they are 6000-6500k, which means random collection of cheap 2nd grade emitters. As Cree do actually bin (categorise them) to specific colour bins, not a massive range.
Also Cree XM-L emitters of this colour temp all have a **** poor CRI rating (go look up the Cree data sheets if you don't believe me). Probably looking at 70CRI tops, which is just rubbish for a headlight.
Then look at the number of errors in the specs. They claim 4 different lumen outputs, plus spelling mistakes. So it proves the claims are mostly bull**** anyway.
And they also tell you the amp rating. Well once again go look up the Cree data sheet, as you won't be getting anywhere near the lumen claims from the amp draws.
I've seen people running these lights and they give a horrid nasty blue/purple tinted light, just like you get from crappy £5 ebay Chinese LED torches. And the beam profile is dreadful on them and does dazzle other drivers or cars in front.
If those lamps where £55/pair they'd still be over priced!!!
Utter garbage sold to the naive for mass profiteering reasons.