1st soil(less) indoor grow

@siLva_77, I was using a cheap LUX meter (BTMETER BT-881E) with a conversion factor of x.028, thanks to MIGRO. MIGRO compared the LUX meter to a Apogee Instruments PAR meter to get the conversion factor. The readings seem to be very similar, but the Lightray is much more convenient. In the app, you can choose PPFD, DLI, Lux, or Kelvin. Migro did a comparison, but used a iPhone 12 and a Samsung S22 (both outdated, IMHO). https://migrolight.com/blogs/grow-light-news/par-meter-apps-compared-for-accuracy?srsltid=AfmBOoqhp9mtT0dhcD3BpzIhk1kTIo_e7uXHk2X99Kd8Je5LDDY77flo I have not seen a recent accurate review of the Photone app with the Lightray Diffuser with the latest phones. Photone, of course, says it is within a few percentage points of pro PAR meters