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, ...

Outdoor time from a diary and portable light meter over a 1-week period was compared in 117 Singapore children aged 6–12 years with and without myopia. All children wore a (HOBO Pendant temp/light ...

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 ...