ichabod crane
Well-Known Member
I wont be getting a 200 watt cob anytime soon. They have no supporting items like reflectors, mounts ect. When those come out maybe.
email from Jerry at kingbrite about 3590's
- Thread starter linky
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nevergoodenuf
Well-Known Member
This one is a little ugly, but I was in a hurry and just need the light for work (dirt job site)
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guod
Well-Known Member
Airwalker16
Well-Known Member
I'm usually pretty tight.
Airwalker16
Well-Known Member
With 200 watts, if ran that hard, I'd think bare cob would be what you'd want.
DonaldsNugMachine
Member
Are his MW drivers genuine or like the crees he sells or knockoffs? I'm wondering if the electronics are the same not if MW will back them up. I'm assuming it's similar to his crees... Nothing wrong with that... Chinese communist party kept Thinkpad line running so they could all get Thinkpads...
ichabod crane
Well-Known Member
I dont want to spray light all over. I want it focused on my plants. I am sure there is a lot of light going to the sides. I want to know almost exactly how much light is going to my plants. I dont want to guess how focused each chip is or is not.
Do these chips have mounts yet? If I spend the time building them they wont be put together with tape. I want a good solid connection that will last for years.
His drivers are MW. If there is an issue with them, he will take care of it for you even. He has treated customers here very well.
MeGaKiLlErMaN
Well-Known Member
well 200W in one LED is not spraying all over. probably not... but thats nothing that thermal adhesive cant handle
ichabod crane
Well-Known Member
Huh how is thermal paste going to stop light from going to the side?
If you put a 200 watt some where you will get light loss. It will light the walkways or be lost on the side of the grow area. Till that light can be focused I am not going to purchase the cob. If it has a large foot print I dont care because I can engineer a set up to over lap.
But more watts means more light to the sides. No way around it. Just a fact of using cobs.
ichabod crane
Well-Known Member
Let me put this a different way.
I am running LEDs for the efficiency period. If the light goes out to the side that is not very efficient.
And if the pattern looks like a HPS PPFD chart with a hot spot in the middle that is not very efficient. In other words I want a reflector to channel the light into a even pattern.
How big that pattern is does not matter as long as it is consistent from cob to cob.
I am running LEDs for the efficiency period. If the light goes out to the side that is not very efficient.
And if the pattern looks like a HPS PPFD chart with a hot spot in the middle that is not very efficient. In other words I want a reflector to channel the light into a even pattern.
How big that pattern is does not matter as long as it is consistent from cob to cob.
MeGaKiLlErMaN
Well-Known Member
Well you wouldnt run one thats for sure so no need to worry about having one light source. If you ran it at 50% and had one LED per every 2 sq/ft it might be profitable or even 3 or 4 in a 4x4 / 5x5 if there was a need... say that the price per COB was $50-60 it could be worth it.
MeGaKiLlErMaN
Well-Known Member
Its going to mount the LED to a cooling surface... no drilling or anything.
ichabod crane
Well-Known Member
Forget I even mentioned it. You are not understanding why I will wait to buy them. And I dont want to explain it any more. And frankly it does not matter if you understand why I dont want them yet.
CobKits
Well-Known Member
agreed. my tests are different than malocans, i was just trying to generate relative scaling/costing data, which i did, and led me to make *my own conclusion* that citis were currently the best performance and value before i repped them. so it may look like i push citizen because i sell them, but the opposite is true, i sell them because (imo) they are the best.
in a perfect world wed do a quick and dirty test like mine on multiple samples from every different manufacturer (i have getian samples on the way in all sizes and colors), and from these quick and dirty tests we would do more testing. i could give a shit less about integrating sphere data, id rather have 10 good useful data sets for the cost of one "correct" one. But a good next step would be to do the real world tent test in multiple points like malocan did.
problem being repeatability. ive seen lots of these tests (not malocans necessarily) where you see a huge bias to one side of the tent because the fixture is a few degrees off axis. my test isnt perfect - but its damn repeatable. level cob mount, level sensor mount, fixed distance, on axis, carefully measured current. when 3000K 1825 beats 3590 CB by the same margin that 5000K 1825 beats 3590 DD there is an element of repeatability there though not strictly on the same samples. im not made of money and these tester chips will invariably end up in builds for me and my close buddies, so i cant just bust out 10 chips to generate repeatability data (esp. when those with access to the newer cree bins wont even do any level of testing (or make it public) remotely approaching my barely acceptable level of detail)
there is zero point in using a $10000 pulse current tester in a $250,000 integrating sphere to generate "perfect" data for 2 reasons:
1. al of these chips will be obsolete within 6 mos
2.all of these chips are going to be used in a huge variety of applications with a large matrix of variables more important than whether your chip is +/-3% in efficiency
CobKits
Well-Known Member
theres a small handful
https://www.rollitup.org/t/cheap-and-cheerful-diy-using-citizen-cobs.909460/
this thread gets citi-intensive around pg. 5:
https://www.rollitup.org/t/top-bin-cob-comparison-2.897765/page-5
another:
https://www.rollitup.org/t/is-this-a-vero-29-killer.906620/
CobKits
Well-Known Member
you gotta remember that the market is stadium lighting, streetlighting, high bays, replacing large HIDs
larger cobs may or may not have a use for us
for example the ~384W max clu058-1825 is an excellent value and outpaces a CXB3590 across the board at efficiency/watt even at low currents, and is priced about the same
then there is the $60 500+ W clu05-3618 which beats both of the above across the board at a given wattage, but its high cost per chip makes it not the best value for an application not needing mega wattage.
in other words (similar to what smart cxb3070 users have known for some time)- three $40 1825s will put down more lumens than two $60 3618s at the same price... and offer better coverage
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Airwalker16
Well-Known Member
Airwalker16
Well-Known Member
I'll be buying some, as long as the price point is on par. Don't you worry about that. Do some testing on and take lots of pictures of them when they arrive!yes you were the fire under my ass for that one - youre on the hook to buy some i got $600 into samples