UPDATE 4-7-22 I still love these lights [See initial review, below] but after less than a year, one of the four has completely failed. So what about the "3 Year Warranty", you may ask? Well...these lights came with no [as in zilch, zero, nada] paperwork or contact information; not even a manufacturer's name....so how is one supposed to invoke the mythical 3 year warranty? I contacted Amazon, and they didn't even have an answer! They just said that the seller/manufacturer was in China....so basically, SOL. That being said, I still don't know of any better solar lights...or even any that are as good as these....so I'm keeping my fingers crossed that the others will last longer.I am super impressed! Looked around quite a bit before buying these (My first solar lights) and my efforts paid off! These puppies are literally 10 times brighter (!!!) than the ones the guy across the street has (And he always buys good stuff), and while his go dark after just a few hours, these stay lit and nice and bright until it gets light in the morning! I was leery of getting solar lights, figuring they likely wouldn't do very well in the winter, when it gets dark early, but after seeing the performance of these now, I'm confident that they should at least last till the wee hours evern in the dead of winter (Will update this review in the future and let youse[sic] know). These lights are fairly well constructed; they look great, they have the biggest solar panel I've ever seen on a light of this size, and a large robust battery (Forget the ones that take AA or triple-A rechargeables!) No exaggeration, these are the best solar lights I have ever seen. I bought the four-pack...and I like 'em so much, I may be buying more. And a three-year guarantee! (No paperwork came with mine, so I need to contact Amazon about that....) -Oh, and they are easy to mount. They are lightweight, and the few pieces of mounting hardware included with them can easily be adapted to many situations- I just mounted mine on standard 2.5" PVC pipe -the cylindrical metal sleeves slip over the PVC pipe perfectly- drilled a hole in the sleeve and through the PVC, and used a lag bolt to secure- VIOLA[sic]! A cheap "lamppost"- paint whatever color ya want if ya don't like white!