I have a adjustable fixture mounted on the ground to uplight the tree.

The initial fixture lumen above 90 degrees from nadir is 0 which is full cut

off fixture.

How can I sum up fixture lumens above 90 degree from nadir

when the tilted angle of the fixture varies from 150 degree from nadir and

180 from nadir ects....

Am I supposed to include all fixture lumens to be 90 degree from nadir

since it's adjutable?

Am I supposed to include whole fixture lumen to be