The best solar light is the one matched to the job, so start with the use rather than the brand. For garden beds and paths, look for 150 to 300 lumens and an IP65 rating. For driveways and security, look for 300 to 700 lumens and a motion sensor. For commercial and civil work, look for a separate panel and a replaceable battery. Across every category the same two specifications separate the good from the disposable: a monocrystalline panel and a lithium battery.