Is it possible to measure absolute values of the light intensity with the light sensor of the MOUSE-E-MOTION Universal Data Logger?

Yes, if certain prerequisites are matched. The light sensor is not calibrated and because of the sunken location in the data logger the measured light intensity values are attenuated by a specific factor different for each particular device. So the measured values are not correct absolute values of light intensity. If such values are wanted, it would be necessary, for each particular data logger, to determine the proportion of the light sensor’s values to reference values measured with a separate lux meter. If the proportion is known, a quantitative measurement of light intensity is possible on condition that the data logger is exactly re-positioned.