What would you pick led or hps?

Budzbuddha

Budzbuddha

Well-Known Member
For the nerds.

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The leaf water content serves as a vital physiological parameter, providing insights into the growth and health of vegetation. Previous experimental studies have revealed a close connection between the spectral characteristics of plant leaves within the TIR wavelength range and water stress conditions. However, the precise mechanism that governs the relationship between TIR reflectance, leaf structure, and water content remains a mystery that requires further investigation.

Transpiration at temperatures also become a factor.

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Although I didn’t jump down the rabbit hole completely- all plant processes rely on conditions to maintain full photosynthesis / transpiration / water usage / cellular health .

IR / UV are part of the puzzle. Especially when indoor growers try to mimic “ natural “ conditions.
Which nowadays can be supplemented with dedicated strips / additional lighting / etc.
 
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1212ham

Well-Known Member
MickyMouseSmokeHouse said:
I'm currently running one 600 watt hps setup in my 7ft x 2ft grow tent, I mean my closet. One light is not cutting it for me. I was thinking buying another 600watt hps setup and just run them both at 300watts go up on watt from there till circuit pops. I'm limited to power wattage. My vary first grow light I ever bought was one of those led blue an purple light that was trash. I was thinking trying leds again. I was thinking buying Mars hydro ts1000 or Ac infinity Ionboard like 2x2 or 2x4. If you use an led light what brand and how do you like it?
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I'm not impressed with Ionboards and Mars was known for trashy blue and purple lights, aka blurple. Of the lights mentioned, HLG has quality and first rate customer service, the Viparspectra XS1500 pro is a good value with very good light distribution.
 
tstick

tstick

Well-Known Member
The only type of lights that I haven't grown with are plasma and CMH. I think plasma is a thing of the past and I'm already looking at getting a new CMH unit when I buy another light.

I see advantages to both. I grow in the winter so it tends to be a little too cool in the area....That's an advantage of HPS because they generate lots of "inefficient" heat....which really isn't inefficient if you grow with LEDs, by comparison, and have to add a heater to the space.
 
Rocket Soul

Rocket Soul

Well-Known Member
amneziaHaze said:
Well somebody decided its needed in grow lamps to activate something because uv alone isnt good enough
I got 10 diodes in mine fells like nothing but....
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If you want to add ir your best bet is adding some incandescent light bulbs to your grow, its got plenty of IR and even reds in 680-700nm which are hard to get with leds; altogether its a much easier application. And youd get it on a separate channel so you can turn it on or off at your own will depending on summer/winter.
 
igna

igna

Well-Known Member
Regarding the use of IR in plants, for me with an example it is simple to understand the importance of infrared.


Let's see a sunny day lying on the towel on the beach with the sun shining, you will start to sweat, you will end up tanned and sweltering as hell.

If you go into a UV ray booth you won't sweat but you will get tan.

So there is the difference between LEDS and HPS.
One has a lot of infrared and gives you heat which makes you perspire (sweat).
What is done to promote transpiration and water movement in plants? CHECK THE VPD.

Another example, you do not need to sweat from infrared, another method to sweat is the sauna, Turkish bath, etc... which by controlling the temperature and humidity makes you perspire (sweat).

With all this I want to make reference to the fact that infrared is important and why it is so essential to control the VPD with LEDs.
 
Nutty sKunK

Nutty sKunK

Well-Known Member
tstick said:
The only type of lights that I haven't grown with are plasma and CMH. I think plasma is a thing of the past and I'm already looking at getting a new CMH unit when I buy another light.

I see advantages to both. I grow in the winter so it tends to be a little too cool in the area....That's an advantage of HPS because they generate lots of "inefficient" heat....which really isn't inefficient if you grow with LEDs, by comparison, and have to add a heater to the space.
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Exactly why I use CMH. Radiant heat and the veg/flower is epic using Argo bulbs.

Got 2.1lbs out of a 4x4 with 490w CMH and they were autoflowers lol
 
Rocket Soul

Rocket Soul

Well-Known Member
igna said:
The choice of your light does not correspond to you, it corresponds to the temperature where you want to place your crop.

If it's a cold place, HPS DEFINITELY.
If instead you grow in a hot place LED.
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Why not CMH instead of HPS? For us it yielded better watt per watt, its also a lot less prone to heatburn plants.
 
igna

igna

Well-Known Member
Rocket Soul said:
¿Por qué no CMH en lugar de HPS? Para nosotros, produjo un mejor vatio por vatio, y también es mucho menos propenso a las plantas a quemarse por calor.
[/CITA]
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You are absolutely right, the problem is that I have not tried it, I have only grown with LEDs and HPS, so I cannot recommend something that I have not tried hehe
 
amneziaHaze

amneziaHaze

Well-Known Member
igna said:
Regarding the use of IR in plants, for me with an example it is simple to understand the importance of infrared.


Let's see a sunny day lying on the towel on the beach with the sun shining, you will start to sweat, you will end up tanned and sweltering as hell.

If you go into a UV ray booth you won't sweat but you will get tan.

So there is the difference between LEDS and HPS.
One has a lot of infrared and gives you heat which makes you perspire (sweat).
What is done to promote transpiration and water movement in plants? CHECK THE VPD.

Another example, you do not need to sweat from infrared, another method to sweat is the sauna, Turkish bath, etc... which by controlling the temperature and humidity makes you perspire (sweat).

With all this I want to make reference to the fact that infrared is important and why it is so essential to control the VPD with LEDs.
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yea but that vpd sweet spot doesnt really need that much heat
 
compassionateExotic

compassionateExotic

Well-Known Member
Key with any lights is knowing its limits and it’s environmental needs for it to achieve ur plants ability to input and not get too stressed . key is following vpd and knowing ur canopy temps
 
B

bongboy8200

Member
Following. same boat, I'm in a closet 2.5x5x8 500w hps a few cfls. Looking to switch to LED to cut on the electric bill to add another room or tents. The closet is a pain the ass and my state is legal so... Also I have AC in the summer and with the door shut it gets too hot I need to run a fan with a scrubber. I know Mars and HGL have been in the game since I started and LEDs sucked. I'm super nervous about spending $500-$1000 and the bud sucks. I used to go by 2700k to flower 4500 to veg. Max watts/area. These leds are way more complex or at least it seems that way. I can't seem to find any straight forward place to start. Same lights to veg and flower, different, use the power controller to turn down etch.
 
D

Dave455

Well-Known Member
Delps8 said:
I love AC Infinity products…except their lights. The only reason I would recommend one of their lights was if a grower was insistent on having "total"' integration of their light with the rest of their grow. AC Infinity has done a great job in that respect. On the other hand, the spectrum that they've chosen strikes me as strange and the light output is markedly lower than many other products on the market. I believe that what works to their advantage is that most growers don't give their plants all that much light and they've arrived at the understanding that it would be a poor business decision to design and sell a more expensive product that will not be used to its fullest.

If I were growing in a 2' x 2' tent, I'd go with the Vipar Spectra XS-1500 Pro. It's a stunningly good product. In a feature comparison, I don't know of anything in the market that can touch it. Price, vendor reputation, and spectrum are good but what made my jaw drop was how uniform the light cast is. Vipar rewrote the standard.

Check out this review.

[edit]
7' wide or 7' tall?

A 2' x 7' tent will need a much bigger light. In rough terms, input wattage of 30 watts per square foot is the minimum and 40 watts is better. Cannabis yield increases almost in an almost linear manner as light levels increase until you hit the light saturation point.

With a grow space that's elongated like that, you'll need to have multiple lights "in a row". Funny, I was thinking about that last night for my 2' x 4' - three XS 1500's, nose to tail, so to speak. Vipar sells two 1500's joined with a bracket. It's called the XS2500 and it's $200 on the 'Zon with a $30 coupon. You could do one of those + a single XS 1500 Pro. That's only 32 watts/sq ft but it's also just over $250. Maybe go with 4 XS 1500's? That's 600/14=42 watts/sq ft and you're rockin!
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vipar xs1500 I think lacks a higher 660nm red for flower.
 
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Delps8

Well-Known Member
Dave455 said:
vipar xs1500 I think lacks a higher 660nm red for flower.
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You're referring to the XS-1500 Pro, right? The XS-1500 has more red in it than the Pro.

I don't know what drove that decision for that change but one reason might be that the new spectrum grows a plant that will fit better in a 2' x 2' space because a small space like that might not have the headroom to fit a plant grown under a lower % of blue light.

The higher % of blue will keep the plant short but the better - and incredibly well engineered - PPFD map will result in a higher yield.
 
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