Most good quality solar lights have the required level of protection from the elements. As such, the IP65 rating shows that the product is durable and weather-resistant to withstand harsh winds and rain. When it comes to the overall life of solar lights, the batteries in outdoor solar lights can be expected to last for 3 to 4 years before needing replacement.
The LEDs inside the solar-powered lights are usually quite reliable and can last for about ten years before you’ll need a replacement. Fortunately, the products are not that expensive, and some manufacturers include a warranty, so you can rest assured that your investments are protected.