Hi, I'm not sure I understand the difference between IIO_LIGHT vs IIO_INTENSITY as seen by the IIO. As far as i know: * IIO_LIGHT channels are used to measure illuminance [1] and the units after application of scale and offset are lux. * IIO_INTENSITY channels are used to measure luminous intensity [2]? I guess that units after application of scale (?) are candela (although, not documented in the ABI file [3]). Anyhow, reading the code for drivers with IIO_INTENSITY channels it is not very clear what is the unit for in_intensityY_input or in_intensityY_raw after application of scale. e.g for isl29125 the unit is lux [4] thanks, Daniel. [1] http://en.wikipedia.org/wiki/Illuminance [2] http://en.wikipedia.org/wiki/Luminous_intensity [3] http://lxr.free-electrons.com/source/Documentation/ABI/testing/sysfs-bus-iio#L992 [4] http://lxr.free-electrons.com/source/drivers/iio/light/isl29125.c#L122 -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html