The one is rating both lights as a pair 60+60=120W. Sometimes, especially knockoff LED headlights, are advertised for the rated halogen type bulb they will replace. So, I wouldn't look as closely at the listed wattage (W). The vendors think if they say higher wattage, it is better than the other guys because is uses more power. People tend to think in terms of watts because of incandescent and halogen bulbs they are most familiar with. By the wattage, you could pretty much know the brightness with those bulbs. These are different animals.
The WHDZ LED's from the OP say 36W:
https://www.amazon.com/gp/product/B019I0UBLU/?tag=wranglerorg-20
I chose to buy the ones above (haven't received them yet) since they are proven by others. The ones you linked say they use more power, even though this might be the exact same light. Your guess is as good as mine since, the Amazon light looks almost the same as the Truck Lite. A clone of a clone, maybe? While the Amazon ones list they are 36W each, the real Truck lites don't advertise wattage that I could find on their web page. Maybe we can find it somewhere. Halogen people need to see it, LOL. For LED's we need to look at the lumens, most importantly the lux, and current draw at 12V to get a better picture of things to compare their output quality and efficiency.
Here are the real ones:
http://www.truck-lite.com/webapp/wc...urlRequestType=Base&langId=-1&catalogId=10002
Look at the specs of the Amazon WHDZ clones vs. the real Truck Lites, they are very similar (comparing 12V system numbers):
Clones 1.80a low beam, 3.60a high beam
Truck Lites 1.45a low beam, 2.45a high beam*
(* assuming these are in a 12V system since they don't specify)
If these advertised numbers are correct, my guess is the clones are not quite as efficient and they have to use a bit more power to achieve nearly the same end result (assuming the output appearance and lux ratings are indeed similar). So, either the LED technology is less efficient or the reflector is less efficient. A clone always achieves to look the same and perform the same, but they are not always made with the same components. The Truck Lite technology is amazing because it generates a lot of quality light down the road (high lux rating) with very little output in lumens. This means their reflector technology is very effective.
Hope this helps.
