VIIRS/NPP Gap-Filled Lunar BRDF-Adjusted Nighttime Lights Monthly L3 Global 500m Linear Lat Lon Grid, with short-name VNP46A3, is the third nighttime lights (NTL) product in the Black Marble suite, which provides monthly composites generated from daily atmospherically- and lunar-BRDF-corrected NTL radiance to remove the influence of extraneous artifacts and biases. The VNP46A3 product contains 28 layers. They provide information on the NTL composite, the number of observations, quality, and standard deviation for multi-view zenith angle categories (near-nadir, off-nadir, and all angles), their snow-covered and snow-free statuses besides land-water mask, latitude and longitude coordinate information. They also include detailed information and description of the quality flags. This description pertains to the SNPP VIIRS Monthly Lunar BRDF-adjusted NTL collection, whose record starts from January 1st 2012.