Seeing light

[Growbig420420]

Is 9000 average lux too much light for a 1 week old seedling

 

[Jjgrow420]

Lux is not an accurate measurement of usable light. Its what the eyes see. Try getting an accurate ppfd in umol/s

 

[Wizzlebiz]

Lux is not an accurate measurement of usable light. Its what the eyes see. Try getting an accurate ppfd in umol/s

I use lux readers with extreme success.

Up too 10000 lux for seedings. If it looks stressed take down to 7000

 

[Green Refuge]

If you have iphone download this par measuring app its pretty accurate.

Photone - Grow Light Meter

The grow light meter app to measure PAR / PPFD, DLI, lux / fc, or Kelvin with your iOS or Android phone. Including PPFD meter and DLI conversion for plants.

growlightmeter.com

 

[HydroKid239]

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

I used the App mentioned above before. It seems legit.

 

[Green Refuge]

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

I used the App mentioned above before. It seems legit.

Yeah it's really nice and seems accurate according to people that tested it against legit par meters.

 

[HydroKid239]

Yeah it's really nice and seems accurate according to people that tested it against legit par meters.

I went and paid for the LED par meter add on for 5 bucks. Pretty nifty app.

 

[Green Refuge]

I went and paid for the LED par meter add on for 5 bucks. Pretty nifty app.

Worth every penny for what it does.

 

[EhCndGrower]

Do you need to pay for the LED portion or do you think the ones offered for free would be good enough. I know they are designed for different lighting sources, but $7 is $7

 

[HydroKid239]

Do you need to pay for the LED portion or do you think the ones offered for free would be good enough. I know they are designed for different lighting sources, but $7 is $7

This is under my ts1000

 

[Green Refuge]

Do you need to pay for the LED portion or do you think the ones offered for free would be good enough. I know they are designed for different lighting sources, but $7 is $7

I tried it with different light spectrums and it gives different readings. As in select cmh 4200 and put it under led gives a different reading than led under led.

 

[Green Refuge]

This is under my ts1000 View attachment 4803233

My 315 CMH at around 3 or 4 feet putting out 300ppfd. Wonder if that's too much for a month old plant.

 

[HydroKid239]

My 315 CMH at around 3 or 4 feet putting out 300ppfd. Wonder if that's too much for a month old plant.

Is that the only option? No cfl bulbs and heat mat handy?

 

[Lordhooha]

My 315 CMH at around 3 or 4 feet putting out 300ppfd. Wonder if that's too much for a month old plant.

My 650’s at home put out 600 too 800 PPFD at 45% and about 30” away

 

[Green Refuge]

Is that the only option? No cfl bulbs and heat mat handy?

I have a T5 fixture with 4 6500k bulbs. I'll test it with the app see if it's less powerful than the 315cmh.

 

[Green Refuge]

My 650’s at home put out 600 too 800 PPFD at 45% and about 30” away

Holy shoot that's beast mode status. Be really nice for flowering.

 

[J232]

If you have iphone download this par measuring app its pretty accurate.

Photone - Grow Light Meter

The grow light meter app to measure PAR / PPFD, DLI, lux / fc, or Kelvin with your iOS or Android phone. Including PPFD meter and DLI conversion for plants.

growlightmeter.com

Pretty sure the guy who made that app is kicking around here somewhere.