This ultimately depends on how you plan to use these outdoor solar lights. If you just want to add some gentle ambience to your outdoor space, aim to buy lights between 50-100 lumens, as these ...
The PD-BJ200W system is a compact 9,000-lumen all-in-one solar street light featuring 50 W light power and a luminous flux of 200 lm/W. The recommended installation height is 6 to 8 meters.