I charged these lights for 4 days in good bright sunlight and still could only get 2 out of the 4 to come on. Even the 2 that would light produced an unsatisfactory light. Don't know and don't care at this point if it was the non-replaceable batteries, the switch, or something else in the 2 that wouldn't come on. Have returned them all to Amazon.com and will never buy this item again.Of the four, only one worked out of the box. I tried adjusting the batteries which seemed loose but no luck. All 4 were placed on our south facing deck so they received over 8 hours of sun. The sad part is the one that works I really like. It gives out just the right light. But not worth the money for only one working light.These look great and worked great for a few months, then quit. We unscrewed the back and the rechargeable battery wouldn't connect properly. We would jiggle it around and it would work for a little while then quit. We finally gave up messing with them.Well constructed and a great value. when used at deck level the light washes out a bit unless you place the closer together however when placed on a piling as a downlight is perfect.They were ideal....needed 44 to light a long dock.They work perfectly!!Charged all day and never turned on. I tried the switch and it never helped.Mounting screws missing from packageThe failure rate on the Maxsa metal solar powered deck lights is astronomical. I bought twelve. Four were bad out of the box and eight months later only ONE works! They are garbage.Funcionan bien aunq se apagan al poco tiempo de encender aun y cuando estén todo el día expuestas al sol