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You can add an illuminance map, which is a uniform grid of points you can place across your zone; this will report illuminance in lux and save to the eplusout.sql file.

Unfortunately, you're constrained to rectilinear grids so you cannot reliably use this data for calculation of the typical daylight metrics (since it's not always possible to cover the entire floor plate with calculation points per LM-83 for example). Also, you cannot actually view that data in DView; you'll need to view the data in another tool. The old Results Viewer could view this data no problem, but, alas.