I have not yet installed the lights as I am still considering different options. (I may even hold some back for seasonal needs, which is possible given there are 12 of them.). However, I have tested a few and they work exactly as advertised, charging during the day and automatically turning on and staying illuminated throughout the night. The lights themselves are small, but combined there should be no problem lighting an area bright enough to make your way around.  ( Not necessarily sure there is enough light to read with them unless you are quite close and have multiple ones clumped together, but that is to be expected.).  The only possible downside is that the installation depends on screws, which means I can’t necessarily mount them in an area where I have some metal grating (although the flat back surface may mean that double stick tape will work fine as an alternative).