Wearable light data logger for studying physiological and psychological effects of light data

Light sensors can provide valuable information about environmental exposure; however, current light sensing packages are limited. This work presents the development of an open-source hardware device capable of logging light measurements. Due to its lightweight, wearable construction, it is well-suited to human subject research in naturalistic conditions. Its low cost makes it a viable option for population studies. This work offers an example application of objectively determining whether a person is indoors or outdoors based on the light measurements. This application has practical value within disciplines such as environmental and health psychology, which seek to relate psychological outcomes to environmental exposure.