C.O.B.S.S.L. News and Articles
- Thread starter stardustsailor
- Start date
nogod_
Well-Known Member
Did not realize that the other swoboda brother runs bridgelux......lighting mafia...News & Info
Bridgelux Launches New "Human Centric" Chip-on-Board LED ArraysLIVERMORE, Calif., Oct. 27, 2014 /PRNewswire/ -- Bridgelux, a leading developer and manufacturer of LED lighting technologies, will debut its new Vero® Decor Series™ Class A Chip-on-Board (CoB) LED array products at the Hong Kong International Lighting Fair 2014.
http://www.bizjournals.com/prnewswire/press_releases/2014/10/27/NY47634?r=full&full=true
New Decor Series Class A products are the first commercially available LED arrays on the market to meet the full Class A Color specification.
For more information about Class A Color research and development, please visit:
http://www.lrc.rpi.edu/programs/solidstate/colorResearch.asp
The launch of the Decor Series Class A arrays marks Bridgelux's new "human-centric" approach to product development and color targeting by using Gamut Area Index (GAI) to measure how light and color appeal to and are perceived by the human brain.
Available through global channels in mid-November, the new Decor Series Class A arrays are the first products to use the full Class A Color specification from the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute and the Alliance for Solid-State Illumination Systems and Technologies (ASSIST).
In research and development since 2002, Class A Color was created at the LRC with funding by ASSIST. Class A Color redefines high color quality of light. The long-term study examined how people perceive white light sources and what they prefer in terms of color rendering and the white hue or tint of a light source. Bridgelux specifiers and engineers developed prototype lamps based on the Class A Color spectral requirements for the LRC to use in field evaluations.
"Class A Color has been broadly tested and 'tuned' to ensure the most pleasing blend of naturalness and vividness based on subjective human perceptions," said Jean Paul Freyssinier, senior research scientist at the Lighting Research Center. "A majority (75 percent) of those tested from around the world agree that Class A Color light sources provide the best color rendering and optimum saturation levels. It's consistent lighting that won't disappoint."
Distinguished by its human appeal, brightness and natural rendering, Class A colors are inherently more vivid and whites are their whitest due to a broader spectrum of colors and saturation. By achieving a balance of color properties that match how people perceive color, the Bridgelux Decor Series Class A LED arrays not only deliver superior color quality, but provide a better return on investment when compared to traditional halogen and ceramic metal halide bulbs.
Decor Series Class A LEDs consume 30 percent less energy, generate 70 percent less heat, and last 20 times longer than halogen or metal halide light sources.
Lighting has become a critical design feature for high-end retail and commercial spaces, with solid-state LED technologies playing a vital role in helping businesses differentiate and stand out to their customers. Whether creating ambience in a luxury hotel lobby, showcasing merchandise in a retail store or illuminating museum works of art, Decor Series Class A LED arrays deliver a stunning visual experience by appealing to people's natural perception of light, helping to drive improved aesthetics, increased visits, customer purchases and revenue per square foot.
"The launch of our Decor Series Class A LED arrays is a game changer for Bridgelux, our customers and the industry," said Brad Bullington, CEO of Bridgelux. "Light has the power to influence how people behave, what they purchase, their productivity and their mood. Our new human-centric approach harnesses that potential to help our customers create custom light experiences that deliver great aesthetics and a tangible financial impact."
Traditionally, the lighting industry uses Color Rendering Index (CRI) as a primary measure of light quality; however, CRI only measures color distortion. Gamut Area Index (GAI) measures color saturation and strength to more accurately reflect the holistic effect of light and how a person will perceive color. Bridgelux Decor Series Class A is engineered at the optimal GAI and CRI combination based on human perception of light.
Bridgelux Vero Decor Series Class A arrays will be available in 4000 K and 3000 K CCT. They're designed for applications including high-end retail, hospitality, museums and commercial spaces.
SupraSPL
Well-Known Member
I have never added far reds and have not experienced prolonged flowering times or late hermies on sativas. So from my experience I would say it is nothing to worry about. I normally grow sativa DOM hybrids. When my canopy temps rise, then I see problems but that happens with HPS as well so it is not due to the lack of far red in the LED setups.
I agree of course, add blue if supplementing with reds, but not much. I have not experienced an increase in immature calyx or foxtails except when canopy temps get too high.
The working theory is that this job is done by the white LEDs. I am not advocating for blue/reds alone and I would never recommend adding green/amber LEDs. I am advocating either warm whites alone or warm whites with deep reds and deep blue added.
Very good point about the lack of 730nm output from cooling heatsinks. The infrared output levels are very low and probably not affecting the plants. I would take this as further evidence that we do not need to add 730nm LEDs because if the HPS was proving it and the LEDs are not, I can attest to the fact that there is no consequences from the switch.
Sorry if we got off topic a bit, I just wanted to use my experience to show that high -CRI should not be our goal in the perfect COB, in my opinion
SupraSPL
Well-Known Member
Very good data point SG. I am not suggesting that my heatsinks run any warmer than actively cooled ones, I increased the size and surface area of the heatsinks for just that reason and then SDS pointed out that the small amount of infrared radiation would have no effect on the plants either way.
Out of curiosity what are your upper canopy temps during lights on and lights out? Do you notice lower buds "finishing" faster than the upper buds? Are you running straight 3000K?
Edit, just checked out your thread, 63W sq ft! Dang dude that is some intensity. They are looking good but yes a bit behind schedule I agree.
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stardustsailor
Well-Known Member
In .XLS and .ODS files (=> open office file ) .
Use the >>Cree PCT tool << to obtain correct values of If ,Vf & lumens,respectively to BIN & Tc .
(preset at 1.4 A for highest bin of each CCT type of CXA, at TC=40°C .)
On the green bordered area at "MAIN" sheet ,
place the number of units per array type ,their Vf,If and lumens (for single unit ) .
Hit enter ,or click an empty cell,to get the calculated results .
Just notify me ,if I've managed to zip and upload successfully
Cheers.
Use the >>Cree PCT tool << to obtain correct values of If ,Vf & lumens,respectively to BIN & Tc .
(preset at 1.4 A for highest bin of each CCT type of CXA, at TC=40°C .)
On the green bordered area at "MAIN" sheet ,
place the number of units per array type ,their Vf,If and lumens (for single unit ) .
Hit enter ,or click an empty cell,to get the calculated results .
Just notify me ,if I've managed to zip and upload successfully
Cheers.
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salmonetin
Well-Known Member
..thanks a lot SDS...
i download both... ...for my pov both are ok......great great work SDS... ...i need work with this files... and pct tool... ... but actually my lessons are stopped... ...sorry masters... ...i know go too slow... ...maybe next month i continue my lessons... ...for now I'm out of the game... sorry...
...upsss... ...and thanks Guod for your pics...
...Guod the last version of color calculator osram silvania its 5.31... ....you use 5.17...any special reasons for this?...
...i attach the 5.31 for windows... ...user guide pdf inside...
saludos
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stardustsailor
Well-Known Member
Guod,I did digitize the graph provided by CREE's datasheet.
(The same exact way ,i did for the rest of leds/arrays ,I've analysed so far ...)
I've to check it .Thank you,for the notice ...
It might be 3500°K instead of 3000°K
I'll double check it -later- with this :
stardustsailor
Well-Known Member
Well ,I've to admit ,that it looks like a great light spectra ...
What about adding also ,couple of 620-630 to 'fill' that small 'gap' between 600 nm & 660 nm ?
Or 2x 660 @350mA & 2x 630 @350mA ...
(The total % of BL ,then ? )
guod
Well-Known Member
it´s not your mistake.
i postet this mismatch of given graph and numbers in the datasheets more then twice.
get the osram tool its free...
https://www.sylvania.com/en-us/tools-and-resources/Pages/led-color-calculator.aspx
guod
Well-Known Member
i just run the update...me so lazy
stardustsailor
Well-Known Member
That I will do !
Mainlinekush
Well-Known Member
I have 6 Xtra cxa3070 AB 3000k cobbs in hand PM FOR DETAILS if you need them. I bought 20 last ones left from arrow.com
AquariusPanta
Well-Known Member
mmmmmm .. .. .. PANCAKES !!
stardustsailor
Well-Known Member
An 'updated' version (in open office .ods file )
Cheers.
Cheers.
GroErr
Well-Known Member
Circling back to this observation I said I'd check when the bulb shuts down. Not much to report though, no real "after-glow", the bulb itself glows for less than a minute, then goes totally dark. Recorded it on my cam while I was in the room in case the CAM (has IR) saw something I couldn't see but same thing, it just flipped to IR mode within 30 seconds. The secret to speeding up flowering with these Elite Agro's would seem to be in their spectrum somewhere and on throughout the cycle...
Mainlinekush
Well-Known Member
Update cobbs are spoken for that was fast!
I don't think I'll being getting more anytime soon 12 is plenty to get started
tenthirty
Well-Known Member
Be careful.....the IR in the Foscam cameras are 730nm. Don't leave them on all the time or in auto mode. Manually turn them off and on.