I Need Your Help! There's a New Light on the Block

[WeedSexWeightsShakes]

I think a big issue is not staying in VPD. That seems to be where many issues are caused in my experience.

 

[jarvild]

So lets do a comparison of the different lighting types and their PAR values and it's easy to see why people have trouble with LED's and not HID's.
Would you say that a plant vegged under 400 watts of MH putting out 400 ppfd at the canopy, and a 250 watt LED putting 800 ppfd at the canopy would require the same inputs that the MH would ?

 

[NanoGadget]

So let's just cut to the chase. Back in the hps days a grower might go to the grow shop and walk out with this equipment to be up and running:
Hps Fixture
Exhaust Fan
Thermostat
Soil
Nutrients
(possible dehumidifier)
(Co2 optional)

Led Grower gonna need:
Led Fixture
Environmental Controller
Heater
Exhaust Fan
Dehumidifier
Soil
Nutrients
(possible Co2 mandatory if temps too cool to exchange air)

Uh..... no. It literally just meant turning my extraction fan down by about 20%. There isn't a single thing in my space that i didn't already use when growing under hps except the actual lights. Just saves me even more on energy costs.

 

[ChiefRunningPhist]

So lets do a comparison of the different lighting types and their PAR values and it's easy to see why people have trouble with LED's and not HID's.
Would you say that a plant vegged under 400 watts of MH putting out 400 ppfd at the canopy, and a 250 watt LED putting 800 ppfd at the canopy would require the same inputs that the MH would ?

That's a big part of it I think. The light is just so/more intense.

 

[lukio]

Do you think it's because most LED growers are new growers? Is that what's happening? Do you not think SPD as any part to play in a plants response? Just curious, I've liked many of your pics, you got great grows, keep it up!

sup man cheers. like, we should give @MeGaKiLlErMaN his thread back caused its been pillaged in standard RIU fashion. you got a diary bro? I think it was @Johnny Lawrence that nailed the problems with led being environmental, either in this thread or another.

Environment > Light

 

[hillbill]

More intense light wil increase growth and nutrient required. However, LEDs also reduce transpiration rate and soil mix temp in containers so a new balance must oftentimes be found.

 

[ChiefRunningPhist]

sup man cheers. like, we should give @MeGaKiLlErMaN his thread back caused its been pillaged in standard RIU fashion. you got a diary bro? I think it was @Johnny Lawrence that nailed the problems with led being environmental, either in this thread or another.

Environment > Light

Environmental plays a big role too, but you can't disregard light source and quality, lots of papers about plant morphology and SPD. I guess we can agree to disagree. No journal ill put one together maybe

 

[lukio]

Environmental plays a big role too, but you can't disregard light source and quality, lots of papers about plant morphology and SPD. I guess we can agree to disagree. No journal ill put one together maybe

i hear ya! imo plants grow differently under led than hps. good friend of mine is a hps guy that grows all my cuts and his look different. yes to a journal though - not enough of those around!

i just think if you give a plant enough photons it will grow, regardless of spd. if the environment is shit its not gonna be happy...so id put environment above light...that might just be me.

 

[hillbill]

Why the binary approach on environmental or lighting as far as indoor growing? You could water, water and over, over water and kill any mj plant but also a plant won’t do much in the dark.