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LED and BUD QUALITY
- Thread starter Tropical Sun
- Start date
Dirtyempire456
New member
View media item 18706485right under a mars 3500 linear led
[Maschinenhaus]
Active member
Ultraviolet, 400nm and only 2%? So they can advertise with it. The ratio of 660nm to 730nm is not good either, but it's great that you can advertise with it.
Now take a look at Full Spectrum Live -> Light spectrum daylight - noon cloudless sky
Very good SMD LED from Seoul Semiconductor SunLike
@[Maschinenhaus]
With that spectrum they’re not trying to replicate sunlight.
As with what Bugbee advises, they are optimising. Enough green to produce white light for troubleshooting pests and nutrient deficiencies. Enough blue to keep internodes close. Enough UV/blue for optimal terpene and cannabinoid production. Red for flowering and fixture efficiency, IR for Emerson effect etc.
If you want a fixture of theirs that replicates sunlight, they manufacture one for researchers. They call it ‘LightDNA-8’. You can tune it to replicate sunlight anywhere on earth with 90% or greater accuracy.
www.valoya.com
With that spectrum they’re not trying to replicate sunlight.
As with what Bugbee advises, they are optimising. Enough green to produce white light for troubleshooting pests and nutrient deficiencies. Enough blue to keep internodes close. Enough UV/blue for optimal terpene and cannabinoid production. Red for flowering and fixture efficiency, IR for Emerson effect etc.
If you want a fixture of theirs that replicates sunlight, they manufacture one for researchers. They call it ‘LightDNA-8’. You can tune it to replicate sunlight anywhere on earth with 90% or greater accuracy.
LightDNA
Home → LightDNA LightDNA LightDNA®LED At Its Most Advanced The fast development of the LED technology has enabled the creation of sophisticated lighting systems for the most demanding research applications. …
www.valoya.com
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Good luck with that, looks like a million bucks,
I bet it's medicore at best, no disrespect to the grower.
Sunlike ? Spectrum wise yeah... Nothing to push those spectrums though.
Charles Dankens
Well-known member
I've only ever grown w sunlight and led. I built a cob rig about 6 years ago. Ive upgraded it 1x. It uses cree, vero and meanwell equipment. 8 Cobs are mixed 2800 to 4k on. A 24 x 44" frame . I briefly added a far red bar. I do use the migro uva.
I've grown a few A+ level flowers through the years but , with this rig, very rare to have disappointment with presentation, resin, flavor. I'm almost never satisfied w potency.
My space is 26 x 48 x 80"
I've grown a few A+ level flowers through the years but , with this rig, very rare to have disappointment with presentation, resin, flavor. I'm almost never satisfied w potency.
My space is 26 x 48 x 80"
Attachments
Nine LED Brands vs. HID vs. the Sun
Nine LED Brands vs. H.I.D. vs. the Sun
Recent study compares the performance of various horticultural lighting sources
A 5W LED bulb converts 80% of the power into light photons of wavelength 660nm. What is the no of photons emitted by the bulb in one second?
Answer (1 of 2): And here’s a fish: Hope this helps.
you're not even close!
Are the photons emitted by a light bulb of the same type as the photons emitted by a star?
Answer (1 of 9): Yes … photons are photons.
Conclusions
- Every light source tested had unique performance characteristics, including their spectral outputs.
- The PPF efficacy of a light source is but one performance characteristic that should be considered.
- A spectroradiometer is needed in order to assess the spectral output of a light source.
- Changing the definition of PAR will make it more difficult to compare published results that used the current definition for PAR (400–700 nm) with results published based on the extended definition for PAR (ePAR, 400–750 nm).
- The sooner the scientific community can agree on definitions that describe key performance characteristics (e.g., waveband ranges, photosynthetically active radiation), the less confusion there will be when these performance characteristics are used to make plant lighting decisions.
- Due to the rapidly improving LED technology, it is critically important to have a consistent system for measuring and reporting lamp characteristics.
- Due to the challenges involved, commercial growers are encouraged to experiment with new light sources on a small growing area, before deciding to scale up to large production areas.
yep, i agree.... only once is 20years+ of growing can i say we grew ass-kickin weed-
If you built a luminaire using 5w laser cutting diodes within PAR spectrum, would your trichomes ripen, or would your plants die?
I think a problem with using lumen-seconds and source intensity is they are photometry measurements related to human eyesight (hence lumen), and not photobiology terms relating to plants.
Everyone’s still discussing different things.
I think a problem with using lumen-seconds and source intensity is they are photometry measurements related to human eyesight (hence lumen), and not photobiology terms relating to plants.
Everyone’s still discussing different things.
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Charles Dankens
Well-known member
I think a partial explanation is tolerance/familiarity and bias. Friends report a different potency experience. It reminds me a bit of how its easier to enjoy and be less critical of food you didnt have to make for yourself.
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