New Lux Meter--how do I use...

[oreo54]

I know this is an old post, but why do we choose x100 multiplier instead of x10, I’m learning and still not sure what makes it x100 or x10 on my Lux meter ?

When I put it under my lights I get a reading of 1300, if I do times x100 is a crazy number is why I'm asking... this is the Lux Meter I have maybe I need to just use the first 3 numbers When I check my lights I have a reading 1360.


Intell Sensor Instrument AS803

Are you referring to a factor to convert lux to par?
https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator

1360 lux from daylight leds is only 18.23 par.

Pure blue light (450 nm) would be 157.15

 

[diver22]

Are you referring to a factor to convert lux to par?
https://www.waveformlighting.com/horticulture/convert-lux-to-ppfd-online-calculator

1360 lux from daylight leds is only 18.23 par.

Pure blue light (450 nm) would be 157.15

Nice calculator ...thank you very much. so umol/s/m2 is PAR ? still missing something not seeing the same numbers you are.

 

[oreo54]

Nice calculator ...thank you very much. so umol/s/m2 is PAR ? still missing something not seeing the same numbers you are.

Each conversion is different and based on spectrum, you choose natural daylight.
I used low cri led and 450, nm pure blue.

Use the dropdown.

"PAR" is a common and frankly incorrect useage for ppfd.
Long story

PAR, PPF, YPF, PPFD and DLI - MechaTronix LED Grow Lights

The total amount of light (PAR) that is produced by a light source each second. PPF measures the “photosynthetically active photons emitted by a lighting system per second”. Expressed in μmol/second. PPF does not tell us how much of the measured light actually lands on the plants or any other...

www.horti-growlight.com

 

[diver22]

Each conversion is different and based on spectrum, you choose natural daylight.
I used low cri led and 450, nm pure blue.

Use the drop down.

"PAR" is a common and frankly incorrect useage for ppfd.
Long story

Thank you so much for your help and link to this calculator.

 

[diver22]

Also would like to share that Photone has an App for both IOS and Android for Par reading....

Underwater PAR Measurements for Reef Aquariums

The entire reef ecosystem depends on light for photosynthesis, which is measured as photosynthetically active radiation (PAR). But without correction, PAR meters calibrated in air provide only relative values underwater. This article explains how to take accurate PAR measurements underwater.

growlightmeter.com

I got the App test and against the Lux Meter and now the Calculator you provided.