Daylighting Analysis Result

I am working on a Daylighting Analysis and the results seem too low. My understanding is that the percent daylighting that is being graphed is the percent of time from 8am-6pm that the lux is over 300. Given the size of the windows in this test, the percent of daylight should be much higher than 16%. Is there something I am doing wrong?

test2.3dm (3.4 MB) (93.5 KB)

Hi Austin -
Please see for questions related to the Ladybug Tools.