Reliable app for smartphones to read lux
- Thread starter Skyhound
- Start date
Moflow
Well-Known Member
Here's a thread discussing the subject that might help
Lux to PPFD Converter App | PPFD Meter
Hey guys! I am a Java developer and I have started growing for a year now and 3 months ago I have bought a Bava 240W grow light on AliBaba. Since then it become a bit a hassle to adjust the lights and I decided to develop an Android App to make things easier for my self. I also published the...
www.rollitup.org
Skyhound
Well-Known Member
thank you
hotrodharley
Well-Known Member
Don’t bother. Keep it simple and get bud.
twentyeight.threefive
Well-Known Member
Lux
Skyhound
Well-Known Member
I need to bother , i must change from 250hps to Leds , the problem is that the leds emit 1200ppfd at 40cm , and i only have 25cm , to much ppfd can fuck photosint. if i know right ?
MidnightSun72
Well-Known Member
Dim the LED or Add CO2. Or use a diffuser lense/layer between the light and the plants.
twentyeight.threefive
Well-Known Member
Which light? Download any light app. Measure the PAR readings using the app on your HPS. Then you can at least compare values of HPS and LED. If you have a base number, even if it's not 100% accurate you still have a good number to compare the LED to.
Skyhound
Well-Known Member
MidnightSun , i need to dim thats why i need a lux reference so i dont go to low or stay to high , but some people are saying smartphones app are useless others say they give the same readings as lux meter , i dont know ;S
HydroKid239
Well-Known Member
Cheap PAR meter AND accurate!!!
Full disclosure here... I do not own this app. I just figured why not share what I found. I was looking online to actually buy a light meter and seen the prices.... so being the tight wad that I am I searched for bargains.. I found an App in the apple store that reads lux and the basic hoo-ha...
www.rollitup.org
twentyeight.threefive
Well-Known Member
It's going to depend on the smartphone. They all use different sensors to measure light.
Skyhound
Well-Known Member
Skyhound
Well-Known Member
Hydrokid , i just saw a post where u did get 1250 ppfd , thats the ppfd my light gives at 35cm , so much ppdf could it be bad , im at week 4 of flowering , and need to change my hps to the leads because of heat problems , what u think , can i stress out the plants with the change ?
HydroKid239
Well-Known Member
That was around 14" with a spider farmer.
Skyhound
Well-Known Member
but do u think its bad so much ppfd , or do u think its bad changing from hps that gives much less to leds that give 1200ppfd at week 4 of flowering
HydroKid239
Well-Known Member
I'm unable to give you a good answer there. I have only grown under LED. I use CFL to germinate.
MidnightSun72
Well-Known Member
The Korona app with a paper diffuser gives almost the same values as my Dr Meter Lux Meter. Where I measure 36200 on my lux meter korona said 35000, where the lux meter says 42000 korona said 41000.
Rurumo
Well-Known Member
The apps are pretty helpful when switching between lights, t5s to led/hid etc. Even if not totally accurate, you can get a ballpark figure of lux at your canopy with one light, then know if you need to raise or lower the new light. They don't need to be accurate, just consistent to be useful in certain instances, or for newbies.