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Got the LEDs in the mail today and did some testing. The beam pattern is pretty tight, it's still a little bit less focused than the halogen but it's very close, unlike some of the bulbs that aren't meant to replace halogens (have very wide emitters that create very diffuse light). I think the biggest issue is that the 6000K color temp means it is just not perceived as bright by the human eye compared to the yellower light of a halogen. I wish more LEDs would come with 5000K phosphor instead of 6000K because the warmer light is easier to see.
Still, back to back testing, I feel like I can see basically just as far with the LEDs, but the real test will be a dark mountain road which will determine if I need to buy a different set.
The quality of these units is pretty good. I was a little worried the heatsink wasn't in good contact but the round heatsink part got just as hot as the aluminum piece that the diode is mounted to. TBH the heatsink got very hot rather quickly, so these bulbs may not last all that long before getting dimmer from the phosphor breaking down, but we'll see.
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