Photos, Soil, Mars Hydro Grow

[Buds Buddy]

I was just playing with the Meter & it's working fine under the bedroom light both ways (x10 & 3 Digit). 3 digit says 144 about 4' under the light & gets higher as I raise the meter. I probably just needed to keep pushing the Range Button til I found the right spot. Lights don't come on till 7 pm so I have to wait to check them.
So what should it be reading for the 1st week of Flower?

 

[InTheShed]

How to Use a Lux Meter to Increase Cannabis Yields - RQS Blog

Among pH testers, loupes, and refractometers, lux meters are a useful tool cannabis growers can harness to ensure optimal plant productivity and health.

www.royalqueenseeds.com

 

[Buds Buddy]

I'm not sure but I think my light is either too bright or too low. The Meter gives me a 1 at the canopy no matter how I set it.
When I set the meter on the floor I get a 1500 x 10 reading.

 

[Havocsm1]

I'm not sure but I think my light is either too bright or too low. The Meter gives me a 1 at the canopy no matter how I set it.
When I set the meter on the floor I get a 1500 x 10 reading.

My reader reads my big flowering light well over 100k at 4 inches. At about 14 inches it reads about 75k. Use slow movements while adjusting it. It took me a few times to figure it out. Just play with it a bit. Which one do you have? This one's mine. I can twist the sensor so I can have it facing the light but still be able to read it. These are my early veg lights.

Edit: you'll notice a pattern. The recommended distances on your lights instructions are usually pretty accurate (atleast mine were) to the lux meter recommendations. They seem to match up. Also I tested the phone lux meter app it's slightly different than mine but it's accurate.

 

[Buds Buddy]

Here's a few pics of the one I have. As you can see I can get a X10 reading but the other positions just give me a 1. The instructions say if it gives you a 1 the light is too bright for the meter. I'm thinking that 20000 x 10 means 200,000 LUX...Correct ? Could the lights be that bright ? Or is it this Meter?
I do think I'm getting some light bleaching. Post pics later of that. Have to go to work.
Let me know what you guys think as far as this Meter / Light Reading goes.

 

[Havocsm1]

Not too sure about the 1. Mine just keeps going up the closer I bring it to the light. I've seen over 200k while testing it. I use the 10x although I have the 100x option. I just turn it on, put the sensor where I wanna test, face it directly at the lighy and the number pops up.

Edit: I also wanna say the biggest light I use is 260 actual watts. Then I use 2 other smaller ones for flower. I could see how a bigger more wattage light could easily max out one of the meters. My 260 watts throws those numbers like I said atleast to 200k+.

Maybe the 1 is just the meter maxing out kind of like a bathroom scale. I usually start at the recommended distance then check the lux and adjust from there. They're usually pretty close. @Budsbunny

 

[InTheShed]

1457x10 is 14,570 lux, which seems about right for the tent floor. Can you test it in the sun and see what you get? Mine reads between 120,000 and 140,000 depending on the time of year.

 

[THC Onlyfans]

Jealous of you all with your fancy light meters....would be awesome if you could do a comparison vs a phone light meter app....and post results...here...

If someone could just compare using this one would be juuust perfect...

 

[InTheShed]

Farside ran that test, and the results weren't pretty for the phone apps.

 

[Havocsm1]

Farside ran that test, and the results weren't pretty for the phone apps.

@780grow
I ran a test the cell phone seemed accurate. This isn't letting me post pics right now for some reason but I can it's in my first journal. Could have been just that specific app but it wasn't exact. It was off by about 15%. I guess technically 15% isn't accurate..

 

[THC Onlyfans]

Farside ran that test, and the results weren't pretty for the phone apps.

1 off the list of many.. .if i can get at least one to say its accurate im a happy man. Yep ive seen farsides test and choosing to give it another chance!

Bonus points and virtual high five if u use samsung s8

 

[InTheShed]

I guess technically 15% isn't accurate..

LOL!

 

[THC Onlyfans]

@780grow
I ran a test the cell phone seemed accurate. This isn't letting me post pics right now for some reason but I can it's in my first journal. Could have been just that specific app but it wasn't exact. It was off by about 15%. I guess technically 15% isn't accurate..

15% of 50k is +- 7.5k is better than 15% of no reading

 

[Havocsm1]

I'd like to know why PAR meters cost so much.

15% of 50k is +- 7.5k is better than 15% of no reading

I think it was under my early veg lights. My reader read in the 7000s and the cell was in the 5000s. I should test it with stronger lights.. I'll post a pic when I can upload again

 

[InTheShed]

The difference between 42.5k and 57.5k lux is pretty big to a plant. I'd say you're better off just looking at your leaves!

 

[Havocsm1]

Good news for you.

 

[Havocsm1]

@780grow hey bro make sure it's the same app I can't speak for them all and I know there's a lot. Like @InTheShed said others have tested and got different results. It's just called Light Meter check out what the icon looks like on my phone:

 

[THC Onlyfans]

@780grow hey bro make sure it's the same app I can't speak for them all and I know there's a lot. Like @InTheShed said others have tested and got different results. It's just called Light Meter check out what the icon looks like on my phone:

Winner winner light meter on point

 

[Buds Buddy]

1457x10 is 14,570 lux, which seems about right for the tent floor. Can you test it in the sun and see what you get? Mine reads between 120,000 and 140,000 depending on the time of year.

Can't do a sun reading for a few days. Started raining yesterday & suppose to rain till Fri. or Sat.

 

[InTheShed]

You're getting our weather from yesterday. Should be sunny off and on tomorrow for ya!