Simple way to measure the runtimes (TASI TA636B lux meter)

LED Flashlights – General Info
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  1. That’s the one
  2. I’m using iPhone so the link led me to the AppStore. In case of Anduril you will have to download the .apk file and install it „locally” (I did not try that). Check the download page: http://china-tasi.com/appDown
  3. The app gives the absolute values (observe the top part of the first OP picture). You would have to export the data to Excel (see the right-most screen shot on the third OP picture) and recalculate the values, assuming the first sample as your 100% „reference”. This way you will be able to create the graph as the bottom one on the first OP picture
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