Lighting Buying advice

[assulin]

Hi guys!

I have a 3.3x3.3 tent with a HLG 260w and 4 autoflowers in 5 gal pots.
They are 5 days from seed now.
I was thinking of adding a 135w HLG when they. start flowering.
Thoughts?

Thank you!

 

[Death The Cultivator]

Hi guys!

I have a 3.3x3.3 tent with a HLG 260w and 4 autoflowers in 5 gal pots.
They are 5 days from seed now.
I was thinking of adding a 135w HLG when they. start flowering.
Thoughts?

Thank you!

260 is enough for a square meter. Are you running them at max or dimmed.

Why do you want to add more light?

 

[assulin]

260 is enough for a square meter. Are you running them at max or dimmed.

Why do you want to add more light?

Thank you for the reply!

From what i've read you are supposed to have around 35 watts per square foot and at the moment i'm running about 24w per square foot
I run it at max

 

[Death The Cultivator]

Thank you for the reply!

From what i've read you are supposed to have around 35 watts per square foot and at the moment i'm running about 24w per square foot
I run it at max

You want ppfd numbers. 700-800 is where you want to be at. Wattage is just a baseline but different lights have different efficiencies. If you have the r spec then it's 2.7umol/s, imo supplemental lighting like 730/660/uv would be more helpful than extra watts.

I can't find a PPFD chart for the 260s though.

 

[Mañ'O'Green]

Here is a PPFD map:

 

[assulin]

You want ppfd numbers. 700-800 is where you want to be at. Wattage is just a baseline but different lights have different efficiencies. If you have the r spec then it's 2.7umol/s, imo supplemental lighting like 730/660/uv would be more helpful than extra watts.

I can't find a PPFD chart for the 260s though.

Thanks again!



at 4:10 you can see the chart on similar grow area

 

[Death The Cultivator]

Thanks again!



at 4:10 you can see the chart on similar grow area

I'd add some supplemental reds, it would improve flowering and boost your ppfd a bit.

 

[assulin]

I'd add some supplemental reds, it would improve flowering and boost your ppfd a bit.

Thank you!
do you have a link for reference?

so you wouldnt consider the 135 r spec? also for the higher yield?

 

[Death The Cultivator]

Thank you!
do you have a link for reference?

so you wouldnt consider the 135 r spec? also for the higher yield?

The effect of red and far red light on flowering | CANNA Gardening USA

What exactly causes a plant to flower?

www.cannagardening.com

Emerson effect has no effect beyond 800ppfd, I wouldn't try to increase the ppfd as around 1100 is max with c02. UVA is another option and there is also side lighting/under canopy lighting

 

[assulin]

The effect of red and far red light on flowering | CANNA Gardening USA

What exactly causes a plant to flower?

www.cannagardening.com

Emerson effect has no effect beyond 800ppfd, I wouldn't try to increase the ppfd as around 1100 is max with c02. UVA is another option and there is also side lighting/under canopy lighting

Thanks a lot for your help!

I am also considering getting a 4x4 tent and a second HLG 260 R spec. More budget but better coverage?