Abiqua
Well-Known Member
please do, because ambiguity is ruling the day....what variables are defined? because "COB's" have variables all over the place....I hope there is more than one citation!
Yields at differant PPFD?
- Thread starter Trippyness
- Start date
Abiqua
Well-Known Member
going back thru my notes...I think you should have an extra zero before the Decimal point for your conversion, big difference! so those might not be close at all, just be sure, I can share the conversion math, have to dig it all up, been a while going back...
Stephenj37826
Well-Known Member
That would be impressive indeed.
captainmorgan
Well-Known Member
I've pulled 1.25 off a single plant out of a 3x3 scrog a couple times and it took two screens to hold up the plant,I remember thinking that I didn't think the plant could hold much more,there are pics here.
a mongo frog
Well-Known Member
Think he said 3 units of blue.
JorgeGonzales
Well-Known Member
The best part is he is doing it with 600ppfd of "blurple" apparently. I need to buy that light, subscribe to the @Trippyness newsletter, buy his nutrients, and make sweet love to him.
Not in that order.
Not in that order.
Yodaweed
Well-Known Member
Even more reason to want to see it.
coughphee.connoiseur
Well-Known Member
I thought this may be a good thread to direct this question.
Using the sun system apogee par meter what type of ranges for veg should one shoot for in Veg / Bloom?
I've heard and read that a range of (min.)300-700(max.) PPFD for veg, and or (min.) 500-1200(max.) PPFD for bloom.
But i don't know if this translates to the apogee par meter, please excuse my ignorance. Just looking for some clarification.
Using the sun system apogee par meter what type of ranges for veg should one shoot for in Veg / Bloom?
I've heard and read that a range of (min.)300-700(max.) PPFD for veg, and or (min.) 500-1200(max.) PPFD for bloom.
But i don't know if this translates to the apogee par meter, please excuse my ignorance. Just looking for some clarification.
Rahz
Well-Known Member
The way to translate spot readings to a true average would be to map out a footprint and weigh each reading by the area it's in, then tabulate the results and divide. Light drop off isn't linear so more readings would make the average more accurate, but if you know what type of emitter/bins you have then you can work it out on paper with less hassle and no meter. Maybe do both to see how accurate your method is compared to the datasheet/QER prediction.
coughphee.connoiseur
Well-Known Member
Ok cool thanks for the much needed info, Im mapping out D/E fixtures, so idk if the same method applies as emitter/bins.
BOBBY_G
Well-Known Member
This post is obsolete already with the plethora of $400 200W diy kits on the market now.
and this is a cree analysis. citizen even quicker payback most likely
NullaFulla
New Member
Sorry.. but your examples are completely wrong! weighing 180KG and 180pounds is completely different..
As is driving at 80KM/hr & 80M/hr
mauricem00
Well-Known Member
interesting article. the chart was based on performance under a 2 band led (665/470nm). other charts based on natural sunlight show the same results at 1/2 the PPFD of those LEDs with evidence of light stress appearing around 750 ppfd. it would be interesting to find charts developed using HPS or CMH lights. based on limited data it would appear that photo inhibition is driven by violet light while fox tailing seems to be the result of to much red light.
Attachments
Not through,
we still use half ant 3 quarter inch water pipes, and some of us 4 by 4 lumper.
Rilla.
blahplunger
Active Member
Also,one of the main benefits to led lights,is that they are not single point lights as configured.The way to take advantage of this is to use smaller wattage led lights spread out over the same area.Single point lights have a hotspot in the center and get dimmer near the edges.So instead of 1 light for a 4x4 you can use 2 lights and get a much more even spread than a single hps light.This in effect increases your growing area because the edges now get enough light.This is a huge benefit over hid lighting.Manufacturers could even make boards that cover an area perfectly in light but, for bigger areas,that creates a light that is very large.Picture an led light with more leds near the edges and less in the middle.
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