Light meters, these days, are no longer a mystery: From home-improvement stores to eBay and Amazon you can find have at least a few units available for purchase. An open-source light meter, however, ...

This project uses a simple LDR that is calibrated against a reference photometer in order to build a digital lux meter. This project uses a simple LDR that is calibrated against a reference photometer ...

The study by Dharani et al. 1 represents a very informative comparison between objective light meter measurements and the more subjective diary monitoring of time spent outdoors, both of which have ...