Maximum light/ppfd a young plant can take

2cent

2cent

Well-Known Member
If i grow under 200w i get a plant
If i grow 400w i get a bigger plant faster
If i get a 600 they get monster fast..
And if i use 1000w i get a tree...

But what is the maximum my plants can take 3 week from seed and on the 7th node 20cm wide and around 10 sets of leaves...

Till they get bigger they take up no room..
So my question is if i put both my 600w and my 200w led over the 3x3 area the plants are in (rooms big enoigh for lights its 4x8.)
1400watt

Is this toomuch light? Or will they veg up faster than i can smoke a spliff? Im sure there is a point at which there is a maximum is this anywhere near?


My hope is i can get more cutting sites avalible and enter flower sooner if i can up my wattage over them whike they veg before spreading them out
 
nurrgle

nurrgle

Well-Known Member
I use 1000w over every 4x4 footprint. So I have 2000 watts in that space. You should be fine.

There are three main inputs.

Light
Air
Water/nuts.

If all three are on point, you’ll see fast growth.
 
fragileassassin

fragileassassin

Well-Known Member
My advice. Grab yourself a cheap lux meter and play with varying light heights and lux readings. It wont be super accurate readings for the led but itll give you something to use as comparison to how your plants respond. They can survive you experimenting a bit in veg.
Its almost difficult to give a plant too much light unless youre using something with high UV like MH/HPS. What it more so comes down to is being efficient because at a certain point you just dont get much benefit from running more.

An example. 1 foot under a 96w T5 was a bit much for my babies. They didnt burn, but their nodes stacked super super close and it made it difficult to train them how I wanted. I didnt have room to go up so I got a weaker T8 at around 1 foot and its perfect for the babies.
 
Last edited:
purpaterp

purpaterp

Well-Known Member
2cent said:
If i grow under 200w i get a plant
If i grow 400w i get a bigger plant faster
If i get a 600 they get monster fast..
And if i use 1000w i get a tree...

But what is the maximum my plants can take 3 week from seed and on the 7th node 20cm wide and around 10 sets of leaves...

Till they get bigger they take up no room..
So my question is if i put both my 600w and my 200w led over the 3x3 area the plants are in (rooms big enoigh for lights its 4x8.)
1400watt

Is this toomuch light? Or will they veg up faster than i can smoke a spliff? Im sure there is a point at which there is a maximum is this anywhere near?


My hope is i can get more cutting sites avalible and enter flower sooner if i can up my wattage over them whike they veg before spreading them out
Click to expand...
I go for about 67k at that stage so I have a little extra room. 70k is full saturation.
 
cannabineer

cannabineer

Ursus marijanus
fragileassassin said:
My advice. Grab yourself a cheap lux meter and play with varying light heights and lux readings. It wont be super accurate readings for the led but itll give you something to use as comparison to how your plants respond. They can survive you experimenting a bit in veg.
Its almost difficult to give a plant too much light unless youre using something with high UV like HPS. What it more so comes down to is being efficient because at a certain point you just dont get much benefit from running more.

An example. 1 foot under a 96w T5 was a bit much for my babies. They didnt burn, but their nodes stacked super super close and it made it difficult to train them how I wanted. I didnt have room to go up so I got a weaker T8 at around 1 foot and its perfect for the babies.
Click to expand...
I think MH is the better UV source than HPS
 
2cent

2cent

Well-Known Member
fragileassassin said:
My advice. Grab yourself a cheap lux meter and play with varying light heights and lux readings. It wont be super accurate readings for the led but itll give you something to use as comparison to how your plants respond. They can survive you experimenting a bit in veg.
Its almost difficult to give a plant too much light unless youre using something with high UV like HPS. What it more so comes down to is being efficient because at a certain point you just dont get much benefit from running more.

An example. 1 foot under a 96w T5 was a bit much for my babies. They didnt burn, but their nodes stacked super super close and it made it difficult to train them how I wanted. I didnt have room to go up so I got a weaker T8 at around 1 foot and its perfect for the babies.
Click to expand...
U mean like the $15 on ebay lux meter upto 200.000?
 
fragileassassin

fragileassassin

Well-Known Member
2cent said:
U mean like the $15 on ebay lux meter upto 200.000?
Click to expand...
Yeah pretty much.
I use a little bit more expensive version, but ive seen a bunch of people with this one.

Amazon.com: Dr.meter LX1010B Digital Illuminance/Light Meter, 0-100,000 Lux Luxmeter: Camera & Photo

Buy Dr.meter LX1010B Digital Illuminance/Light Meter, 0-100, 000 Lux Luxmeter: Light Meters - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com

cannabineer said:
I think MH is the better UV source than HPS
Click to expand...
yeah i figured someone would add in. idk many specifics of the big lights because im all florescent and LED.
Basement gets too hot in the summer to run any thing that generates much heat.
 
Chip Green

Chip Green

Well-Known Member
Dr. Meter, has been the single most beneficial purchase, in my entire cultivation toolkit.
Finite accuracy, is relative to light source. The good Doctor, cares not, for his only concern is the well being of those who employ his service.
 
You must log in or register to reply here.
Top