please help with PPFD meter app and gavita 1700

I have the ppfd meter app downloaded on my phone, and I'm trying to figure out the correct light source type within the app so I can measure my ppfd correctly. I've looked at the specs on the gavita website and all it says is full spectrum.
So which one would I select?

“Full spectrum lights are lights possessing a 6500K color temperature, a CRI of greater or equal to 95, and closely mimic natural daylight in terms of spectrum.”

Firstly, for sensor calibration you must have a light source with confirmed light output at the middle spot at certain distance - this is in PPFD form so you must convert it to lumens to set your light sensor right before measuring PPFD.

here is the converter: Convert PPFD to Lux - Online Calculator | Waveform Lighti10%ng

I think 6500k+10%ir is good in the app for that panel, on the link's site "high cri led" is the closest.

So, quite complicated.. error margin before calibration is huge and even after the calibration at least +-3%

Also when using phone sensor remember to clean the display so you don't need to calibrate twice (been there)

24" distance, set middle, calibrate straight to 41500lux on the app's lux meter. Then good to go!

Thank you guys!

I've never cared to measure PPFD. Especially with LED my lights sit on my plants @ 100% power in bloom. Yeah some tops will get bleached but that's ok. Some of my tops are legit growing through the light and still turn out fine.


I think of it like this, saving the 10-15% of very top buds to make the other 85-90% get less light isn't worth it.