Advertisements
  • LED Grow Light for cannabis, HLG lighting, Percys Grow Room Ad
  • Ali Bongo, Head Shop UK, buy best bong UK, Percys Grow Room
Notifications
Clear all

Lux meter( get the most from your lights)

21 Posts
6 Users
405 Likes
823 Views
jacks_farm
(@jacks_farm)
Posts: 616
Percy Grower
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
2.5K Post Likes
Known Member
Points: 9094
Topic starter
 

I think every grower should download a lux meter on there phone( a free version) 

Don't worry about the numbers too much but use it to keep all the canopy around the same value ( can use this on any light)

Say you know your plants are happy at 30,000 or 60,000 lux 

You can check all the canopy receives the same amount of lux.

The basic idea is not to use the lux meter to get the correct readings but to find areas in the flower room that are receiving way too much or too little light( may need to move a light or add a light or even lift a pot a few inches.

Another example is the led light may not be level and the right side is getting 25% more light than the left side, it's free and this little tip could make a huge difference to your plants.

 

 
Posted : January 18, 2021 2:53 pm
Zombie Nation, Doctor X, Chillbert and 27 people reacted
Woolie
(@woolieback)
Posts: 2064
Percy Grower
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
250 Post Likes
500 Post Likes
10k Post Likes
5 Complete Grow Diaries
100 Post Likes
OG
Points: 55401
 

Migro shane has done a comparison, and the lux meter on playstore developed by dogger is the set up I use , its not 100% but better than guesstimations on my old lux meter , I like shane he don't talk poop , and I want his array possibly  😆 

Sucking ⛽

 
Posted : January 18, 2021 6:51 pm
twisted1, Basssman7, Zombie Nation and 30 people reacted
WoodI2
(@woodi2)
Posts: 3802
Percy Grower Moderator
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
2.5K Post Likes
5k Post Likes
1 Complete Grow Diary Award
10k Post Likes
Active Grow Diary Bling
I Voted Award
The High Council Award
Hash Champ
25K Post Likes
Section Moderator
1 Plant of the Month Win
OG
Points: 70672
 

@jacks_farm Thanks man. Free toy's

 
Posted : January 18, 2021 8:51 pm
Hart, Zombie Nation, Doctor X and 21 people reacted
WoodI2
(@woodi2)
Posts: 3802
Percy Grower Moderator
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
2.5K Post Likes
5k Post Likes
1 Complete Grow Diary Award
10k Post Likes
Active Grow Diary Bling
I Voted Award
The High Council Award
Hash Champ
25K Post Likes
Section Moderator
1 Plant of the Month Win
OG
Points: 70672
 

@jacks_farm Good info man. Like you said just use it as reference or benchmark. I have dimmable, wide spec LED and no idea what the "proper" setting. But like you said, tune up the old lights, get the level checked. I have two lights in line and had them spaced symmetrical, and thought the over lap was correct. I would have bet good money that the middle was covered better than it was.  And then I only had to move them together a very small amount. Now the numbers are much more consistent. A little tweak here and there and for free.  Now I'll sleep better.  Thanks JF

 
Posted : January 19, 2021 3:24 am
twisted1, Hart, jacks_farm and 18 people reacted
Basssman7
(@basssman7)
Posts: 300
Percy Grower
Patreon Bling
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
1 Complete Grow Diary Award
Known Member
Points: 8755
 

I am glad that @woolieback mentioned Shane from MiGrow. He also has a video where he buys a cheap lux meter from amazon and then uses a tent to plot the values and then compared them to his apogee par meter. He gives the average ratio between them and a graph showing that it is accurate up until just over 40,000 lux and after that the correlation/ratio between lux and par no longer held steady. Being the nice man that he is, he offered up the exact model # for the lux meter. I bought the identical model and in theory, it should have the same sensor in it as the one Shane tested.

I have used it regularly so that I can keep my light close to the canopy to save money on power because I can tell how much I can turn it down and still be giving my plants 800 or slightly more par worth of light.

 
Posted : January 19, 2021 3:37 am
twisted1, Hart, Chillbert and 21 people reacted

LED Grow Light for cannabis, HLG lighting, Percys Grow Room Ad

James
(@james)
Posts: 852
Percy Grower
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
250 Post Likes
500 Post Likes
100 Post Likes
Chat Moderator Bling
Respected Member
Points: 17188
 

I use CPU Z for Android that reads all sensors including the lux sensor that is in nearly all phones now

Plants are like children - always surprising you.

 
Posted : January 19, 2021 5:51 am
Zombie Nation, monkeydo, twisted1 and 18 people reacted
WoodI2
(@woodi2)
Posts: 3802
Percy Grower Moderator
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
2.5K Post Likes
5k Post Likes
1 Complete Grow Diary Award
10k Post Likes
Active Grow Diary Bling
I Voted Award
The High Council Award
Hash Champ
25K Post Likes
Section Moderator
1 Plant of the Month Win
OG
Points: 70672
 

So I down loaded the the Lux meter, Looked up light recommendations and I found 

clones and seedlings - 5,000 - 7,000 lux

veg - 15,000 - 50,000 lux

flower - 45,000 -65,000 lux

max - 75,000

So I moved my light to about 18" - 45cm away from 12 day old seedlings. I adjusted the dimmer to about 12,500 lux across the plants, and now my lights are barely on. When I did my measurements, I had my phone elevated to the top of the seedlings, and the lens of the phone was located directly above the plant each time. As consistent as I could get it. 

So correct me if I'm wrong, but my idea is to maintain the 18"-24"/45-60cm and use my dimmer along with the meter to increase light throughout grow. Yay-Nay? I love my lights, they just don't come with detailed info. I mean they have really cool specs and pretty graphs, but I'm still holding the dimmer in my hand with no calibrated dial face. Then after using the meter I found that the smallest change to the dimmer was a huge increase in Lux at different distances. So manufactures recommendation was WAY to much light, or could easily be if not careful. So the meter appears to be another good tool, will have to learn more.  Thanks again for the thread, much appreciated.

 
Posted : January 19, 2021 3:56 pm
Zombie Nation, Hart, monkeydo and 12 people reacted
Woolie
(@woolieback)
Posts: 2064
Percy Grower
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
250 Post Likes
500 Post Likes
10k Post Likes
5 Complete Grow Diaries
100 Post Likes
OG
Points: 55401
 
20210119 160327
20201206 131814

Sucking ⛽

 
Posted : January 19, 2021 4:05 pm
Zombie Nation, Hart, monkeydo and 12 people reacted
WoodI2
(@woodi2)
Posts: 3802
Percy Grower Moderator
100 Post Likes
250 Post Likes
500 Post Likes
1K Post Likes
2.5K Post Likes
5k Post Likes
1 Complete Grow Diary Award
10k Post Likes
Active Grow Diary Bling
I Voted Award
The High Council Award
Hash Champ
25K Post Likes
Section Moderator
1 Plant of the Month Win
OG
Points: 70672
 

@woolieback  Yep. thats it.

 
Posted : January 19, 2021 4:33 pm
Zombie Nation, monkeydo, Hart and 12 people reacted
Woolie
(@woolieback)
Posts: 2064
Percy Grower
1K Post Likes
2.5K Post Likes
5k Post Likes
Active Grow Diary Bling
250 Post Likes
500 Post Likes
10k Post Likes
5 Complete Grow Diaries
100 Post Likes
OG
Points: 55401
 

@woodi2 thats the 3500k , the 4000k is different , thankfully for as long as I have been growing with leds migro shane has made sure out of the big 9 PFD isn't one of them that is lacking 

Sucking ⛽

 
Posted : January 19, 2021 4:41 pm
Zombie Nation, WoodI2, monkeydo and 12 people reacted

LED Grow Light for cannabis, HLG lighting, Percys Grow Room Ad

Page 1 / 3

LED Grow Light for cannabis, HLG lighting, Percys Grow Room Ad

Our forum is free to join. We are an international cannabis forum that helps people all over the world grow their own personal supply of cannabis. Through our site you will find cannabis breeding forumscannabis deficiency forumsindoor cannabis growing forums, and much more. 

We are a home growers cannabis forum, and we only allow people who grow cannabis for personal use to be members. Our mission is to help you grow your own cannabis. We do not buy/sell/trade cannabis, or equipment for growing cannabis. Our site is strictly a cannabis smokers forumcannabis growers forum and forum for medical cannabis users.

Use our guides on how to grow cannabiscannabis grow diaries, and growers forum to find all the info you need to learn how to grow your own cannabis.

Any member who is suspected of growing cannabis for commercial gains will be banned immediately.

Please read our forum rules, and enjoy the site.

Find us on all social networks! Just search for Percys Grow Room