Floodlights come in a broad range of brightness outputs, perhaps more than any other type of light. You can find floodlights that output anything between 700-20,000+ lumens.
Which one you choose primarily depends on how big a space you need to illuminate. An outdoor floodlight with only a relatively low lumens output (700-1500lm) will suffice for patios and driveways, while commercial spaces like car parks and small fields will obviously need high-powered floodlights that output many times that. There is no hard and fast rule for picking floodlights of a certain brightness, but below is a rough guide that may help.
As mentioned before, placement and angle also make a big difference in how efficiently your outdoor space is lit. Getting these right will give you a little more room with the lumens output of your chosen floodlight. Conversely, if you know the light can not be installed in a perfect position, you can take this into account when deciding on the brightness of the floodlight.
As the leading brand of smart flood light, Novostella's sales volume has already hit 1 million globally. Novostella 100W smart tunable white LED floodlight offers 2700K-6500K color temperature stepless adjustment, 9000lm ultra-high brightness dimmable, which can meet the needs of different scenes (such as docks, construction sites, stadiums, swimming pools, outdoor parking spaces, lawns, farms, warehouses).