sixstring2112
Well-Known Member
I like to eat the soft yellow coating on the vero cobz,its yummy
hes not really saying that, rather that the relationship between lumens and PPF has been discussed for years here. along with mccree absorption, QER, YPF, emerson effect, and why sometimes higher CRI is a better spectrum for our applicationI'm not sure if you are saying I am wrong, but that is what it sounds like.
Absolutely. It's the only way to narrow down the potential candidates. But that's because the datasheets are luminous. The hard part is stopping at that point. I have kicked myself in the as more than once making bad decisions based on a cursory look at a new LED. LEDs are my job. I am involved in Horticulture LEDs with a major University researching narrow band wavelengths. That's why I do not use CoBs and lack CoB expertise. Although in general I have been opposed to CoBs. It's the light bulb mentality that I have issues with. I do not think cramming LEDs into a small area is advantageous and the only reason CoBs exist is because the light bulb mindset and people have such a hard time getting getting beyond the Edison days when it comes to lighting. I also do not like Edison's AC voltage and am of the opinion AC has no place in LED lighting.lumens/watt is a very useful comparative tool
COBs are an excellent source of the photons we seek
I do not think there is any debate in whether a discrete LED is superior to a CoB in terms of flux per watt. But we know that is not the only factor otherwise all grow lights would be using the same 201 lm/Watt LED. For the cannabis hobbyist, CoBs make sense. They do not make sense for a commercial operation. IMHO.discrete diodes may have an edge
Lethal voltages? Since when is 50 volts DC lethal? That's one of the greatest things about cobs, low voltage and wattage.Absolutely. It's the only way to narrow down the potential candidates. But that's because the datasheets are luminous. The hard part is stopping at that point. I have kicked myself in the as more than once making bad decisions based on a cursory look at a new LED. LEDs are my job. I am involved in Horticulture LEDs with a major University researching narrow band wavelengths. That's why I do not use CoBs and lack CoB expertise. Although in general I have been opposed to CoBs. It's the light bulb mentality that I have issues with. I do not think cramming LEDs into a small area is advantageous and the only reason CoBs exist is because the light bulb mindset and people have such a hard time getting getting beyond the Edison days when it comes to lighting. I also do not like Edison's AC voltage and am of the opinion AC has no place in LED lighting.
Also I would likely electrocute myself working with lethal voltages.
Yes, I did see their post. I understand why you would say that and it's a good suggestion. I do like the efficiency of the Samsung 561C LEDs. I have 100 of the 2700K SPMWHT541ML5XAWMS5 on order to use in some experiments, but that was because my first choice in the 561 series was not in stock.@DrMisunderstood Perhaps the Quantum Boards would be interesting to you. There's a dedicated thread for them.
I am seeing 100-300V supplies being used because the 35V CoBs are in series.Lethal voltages? Since when is 50 volts DC lethal? That's one of the greatest things about cobs, low voltage and wattage.
If leds are your business and you don't like cobs then you are about 18 months behind the curve.
So, an led strip light? That's nothing new, but if you can do it efficiently in monos in certain spectrums I would be interested in it for supplemental lighting to go with my cobs. Say around 670 or hit a blue peak other than the 440 that cobs always hit.Yes, I did see their post. I understand why you would say that and it's a good suggestion. I do like the efficiency of the Samsung 561C LEDs. I have 100 of the 2700K SPMWHT541ML5XAWMS5 on order to use in some experiments, but that was because my first choice in the 561 series was not in stock.
I am currently working on a different PCB approach where the PCB and heatsink costs are negligible and LED case temperature ranges from 20-40°C at 1000mA.
I am using 0.4" wide 0.020" thick PCB populated with 2mm square LEDs. The fixture frame is basically the heat sink and the PCB serves as a thermal path to the heatsink. The PCB is that wide to allow it to be attached to the heat sink which costs about $3.00 per foot. The uniformity, based on simulations, is excellent without the need for additional optics. The fixtures are powered by 48V which makes it simple for them to be solar powered (which I do). The 600-700 mW Flux (56% Radiant Efficiency) LEDs are under $1.00. I just bought 250 of the deep blue for $0.12 ea., but I think someone at Digikey put the decimal point in the wrong place.
I'll take your word on that.I like to eat the soft yellow coating on the vero cobz,its yummy
Luxeon SunPlus Series.So, an led strip light? That's nothing new, but if you can do it efficiently in monos in certain spectrums I would be interested in it for supplemental lighting to go with my cobs. Say around 670 or hit a blue peak other than the 440 that cobs always hit.
If you don't even know how to power cobs then you need to check your bias. There are a ton of us here that wire in parallel right around 50 volts.I am seeing 100-300V supplies being used because the 35V CoBs are in series.
I am in the business of horticulture narrow band research. No CoBs allowed.
I do not understand where you got the impression that CoBs are superior to discrete 1-3W LEDs, but I can kick the shit out of any CoB with discrete narrow band LED design.
Not your typical LED strip.So, an led strip light? That's nothing new, but if you can do it efficiently in monos in certain spectrums I would be interested in it for supplemental lighting to go with my cobs. Say around 670 or hit a blue peak other than the 440 that cobs always hit.
I do like the Sun Plus 20 royal blue and deep red (aka Luxeon Color C). I do not like the Sun Plus 35.Luxeon SunPlus Series.
I do like the Sun Plus 20 royal blue and deep red (aka Luxeon Color C). I do not like the Sun Plus 35.
I would not use the purple as it is better to allow the user to set the red blue ratio to whatever they desire. Thus far the research is inconclusive on red:blue ratios.
I can't get the attachment because I am data throttled for a day or two. But from what I can infer I am very excited. I would pay a ton of money for low power, efficient monos on strips. You could mount them to the frame of an existing fixture and wouldn't even need to buy a heatsink.Some here would also use the far red and Luxeon Z 420nm.
Have you read the Japanese research that states plants like green when lights are intense?
2 GPW from the better growers here who were never able to achieve that with narrow band lights. granted were seeing a jump in red efficiency but nobody round here is ditching their warm-white based spectra any time soon.I do not understand where you got the impression that CoBs are superior to discrete 1-3W LEDs,