What are these leaf stproms

[Ph 007]

Does anyone know what's going on here plants Look a quite good
Just these pewf symptoms below,
I was hoping some one would know why and is it bad lol

I'm using led board Samsung chip
240w a board I'm using 2 boards total 480w over a 1 metre square area

Room is sitting about 77-78f
lead temps read 75-77ish
Humidity 64%
^
Iv tired higher room temp 80-82f my leaf temps read 78-80is
So I lowered the room temps to get better leaf temps, not sure if I'm a bit low on room temp but the leaf temps say good and plants seem good plant are drinking fine


The led boards are about 50cm away from the plants

Feed is quite high but I'm just in middle of testing higher feed , 1.6e.c that's 1.2e.c of canna feed all the additives and 0.4 e.c calmag, they are on, canna nutrient and canna coco medium.

Does anyone have experience with the same lights I'm using, I was wondering am I wasting electric by running 240x2 leds board from kings bright i think the company's called,
Like is it to much light, can I active the same yield dimming the lights down to say 150w each, and saving electric,
So be total 300w over a 1metre square,

 

[ComfortablyNumb]

Got dimmers on those lights? Turn them down about 20%. If they are 100, make them 80.
Other than that, Just feed normally.
The roots growing out is normal. Don't worry about it.

 

[Ph 007]

Ye the got dimmers, what I
Done some timwas 3 who was plug the light into a plug that shoes wattage and I dimmed the leds board down and marked 4 settings so in the summer I have marked 75w - 150w 200w and then max, so I can run them down and I know the exact watt now I'd You get me lol, I have dimmed the both lights down yo 150w a board for one grow , room temps was 82-85f humidity dam low 35-45% leaves looked like shit buds looked amazing 5 a plant dry in soil,
But
I was wondering exactly what watt lol to dim the lights to to get good yield enough light and not to much light on to little just realised I could get one of them light measuring device's ;)

 

[ComfortablyNumb]

Experiment a bit to find your plants sweet spot.

Why does raising my light make plants taller?

Newbies hear it all the time, if you want taller plants, raise the light, or dim it. Why? Light Intensity. Light is made of photons. Photons all have the same amount of energy. The farther away the light is, the more it spreads out. The more spread out, the less intensity. Your plants have...

www.thcfarmer.com

A light meter is very inexpensive online.
One like this was about $20

 

[Ph 007]

Experiment a bit to find your plants sweet spot.

Why does raising my light make plants taller?

Newbies hear it all the time, if you want taller plants, raise the light, or dim it. Why? Light Intensity. Light is made of photons. Photons all have the same amount of energy. The farther away the light is, the more it spreads out. The more spread out, the less intensity. Your plants have...

www.thcfarmer.com

A light meter is very inexpensive online.
One like this was about $20

I think I'll order one later and do s9 reading on it thanks

 

[Ph 007]

Experiment a bit to find your plants sweet spot.

Why does raising my light make plants taller?

Newbies hear it all the time, if you want taller plants, raise the light, or dim it. Why? Light Intensity. Light is made of photons. Photons all have the same amount of energy. The farther away the light is, the more it spreads out. The more spread out, the less intensity. Your plants have...

www.thcfarmer.com

A light meter is very inexpensive online.
One like this was about $20

Are you using these board? If so what room temps and leaf do you run?

I was mixing hps and led but now summer even the hps dimmed to 250w still gets to hot , so now on pure led

 

[ComfortablyNumb]

For your plant, if it's on 200, change to 175.

We use a Spider Farmer 1000 and 2 other COB lights in our 2x4 tent.
Currently, we are hoping to win the SE 5000, but if we don't I have alternatives chosen. We are about to start a 4x4 7' tall homebuilt tent.
I just need to clean the space and put it together.

 

[RookieBC]

What's with all the green algae on the fabric pots? That means your not letting them dry out between waterings. Algae is no good especially when it gets into the areas where the roots are. Also I'm not sure why you would need a dimmer I ran a 660w VivaLed with 3 meanwell drivers and it begs a 7.5x7.5 and flowers a 5.5x5.5 in a 2x2 tent with it like 12 inches above my plant and didn't need to dim it