Over lighting??

[Vexor1717]

Hello, about to set up my 3rd crop and had a question. Im finding higher watt lights than the ones I need. Im not sure of the specifics of over lighting but how much is too much?

 

[Jack og]

Hid? Or led

 

[Milson]

Hello, about to set up my 3rd crop and had a question. Im finding higher watt lights than the ones I need. Im not sure of the specifics of over lighting but how much is too much?

The answer depends on whether you are supplementing CO2. Without that, too much is over like 1000ppfd I think. With supplementing, maybe 1500? I am basing this on cocoforcannabis guys.

When I put my two viparapectra full spectrum LEDs on my plants in a 3x3 tent, (150w real pull each), that was too much. So it's not that hard to do (they have a dimmer).

 

[Vexor1717]

Hid? Or led

Led

 

[Dan789]

I’m running 600 true watts (measured from the receptacle) in a 4x4 tent, with enough spacing over the tops of the plants, works fine...no par meter

 

[MIMedGrower]

40-60 watts per sq. foot for hid and cheap blurples.

30-50 watts per sq. foot for modern light boards and strips. They are much more efficient.

 

[Anthem]

40-60 watts per sq. foot for hid and cheap blurples.

30-50 watts per sq. foot for modern light boards and strips. They are much more efficient.

Dropping down to like 28 watts per square foot with the strip type fixtures does not take much away from overall yield

 

[MIMedGrower]

Dropping down to like 28 watts per square foot with the strip type fixtures does not take much away from overall yield

Ok so give or take 2 watts. ;-)

 

[Aqua Man]

Dropping down to like 28 watts per square foot with the strip type fixtures does not take much away from overall yield

Yeah I'm a 30w/sq ft guy. Height makes a big difference so it can vary but 40-50w seems excessive to me unless you are hanging em higher for more even coverage.

 

[Aqua Man]

The answer depends on whether you are supplementing CO2. Without that, too much is over like 1000ppfd I think. With supplementing, maybe 1500? I am basing this on cocoforcannabis guys.

When I put my two viparapectra full spectrum LEDs on my plants in a 3x3 tent, (150w real pull each), that was too much. So it's not that hard to do (they have a dimmer).

Yeah over 1000ppfd imo is to much without CO2.

 

[Vexor1717]

Yeah I'm a 30w/sq ft guy. Height makes a big difference so it can vary but 40-50w seems excessive to me unless you are hanging em higher for more even coverage.

So 300w may be too much for a 32x32?

 

[Dan789]

So 300w may be too much for a 32x32?

How are you arriving at that number of watts?

 

[Aqua Man]

So 300w may be too much for a 32x32?

I would say it's a pretty good fit. Your about 8.5 sq ft. Would put you about 35w sq ft. IMO a very good number

 

[Beowuuulf]

Ideally you want to know at which point the plant is getting its near maximum input, this can be measured...

The goal is the have maximum light at every bud site, via vertical lighting and horizontal.

as long as you know the intensity, you can keep increasing photosynthesis to 100%, from below 50%.. if your 9 factors are perfected.

 

[Aqua Man]

Ideally you want to know at which point the plant is getting its near maximum input, this can be measured...

The goal is the have maximum light at every bud site, via vertical lighting and horizontal.

as long as you know the intensity, you can keep increasing photosynthesis to 100%, from below 50%.. if your 9 factors are perfected.

Someone has been watching Bruce bugbee.

Photoperiod and intensity are also key factors. Basically DLI is what we wanna know. And when we need the most intensity is flower because of the reduced photoperiod

 

[Vexor1717]

How are you arriving at that number of watts?

Well, 300 is the lowest I can find for a good price with everything I want included (fans, veg/bloom settings etc.) Is it too much?

 

[Aqua Man]

Well, 300 is the lowest I can find for a good price with everything I want included (fans, veg/bloom settings etc.) Is it too much?

No. It's a good number. Bit is that 300 watts from the wall? Not what they advertise. Can you link it.

 

[Dan789]

Well, 300 is the lowest I can find for a good price with everything I want included (fans, veg/bloom settings etc.) Is it too much?

What I was referring to was how you figured 300 watts. Many fixtures are sold with an arbitrary number, which unless you’ve drilled down into the manufacturers info, may not be the actual watts...IE In the past I purchased a 1200 fixture, it’s draw was only 240 watts...

 

[MIMedGrower]

Well, 300 is the lowest I can find for a good price with everything I want included (fans, veg/bloom settings etc.) Is it too much?

I think he is saying to be sure the lamps output is 300 watts. Many led companies advertise an inflated compares to wattage.

 

[Vexor1717]

No. It's a good number. Bit is that 300 watts from the wall? Not what they advertise. Can you link it.

I'm looking at a few but something like this.
https://www.amazon.com/dp/B07843C284/ref=cm_sw_r_other_apa_i_QuL8EbZYW6VMC