Interface PBLight

light color default White

whether the light is on default true

light brightness in lux (lumens/m^2).

for global directional light, this applies as a constant value at all surfaces and distances (though the effect on the surface still depends on incidence angle). the default global light illuminance varies from 400 (sunrise/sunset) to 10,000 (midday). for typical values, see https://en.wikipedia.org/wiki/Lux#Illuminance

for point and spot lights, this is the lumens/m^2 at 1m distance from the light. to transform from raw lumens, divide lumens by ~12 (4*pi). e.g. a 100w household bulb with 1200 lumens would have an illuminance of ~100. a lighthouse bulb with 200,000 lumens would have an illuminance of ~15,000 (ignoring beam reflections)

default for point/spotlights: 10,000 for global directional light: depends on explorer implementation. may vary on light direction, time of day, etc

whether the light should cast shadows. note: even when set to true the engine may not display shadows, or may only show shadows for a limited number of lights depending on the implementation, platform, and user settings. default for point/spotlights: false / off for global directional light: true / on