I'm giving only four stars because I've had the lights for only a couple of weeks, so this review is premature. So far, the lights work as advertised. They seem to last the whole night on the low-brightness setting. I haven't tried the high-brightness setting, which is supposed to last six hours max.Over the years, I've bought about a half-dozen sets of solar lights for my 400-foot-long rural driveway, along which I mix and match the various types. Their key feature is battery longevity, so I've always replaced the AA-sized rechargeable batteries with long-life Eneloops, which I charge the first time (and as needed) with a separate battery charger, a four-position Bonai that I keep in our laundry room.I had some doubt about these lights because their batteries are not replaceable. But I bought them for their neat design, adjustable height, reasonable price and adjustable brightness levels. Although slightly different in color from the rest, these four go nicely in the area my near garage. If I can remember, I'll update this review in a year of so and report how well they last. So far, so good.
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