Spectrometer and new COB

nevergoodenuf said:
https://led.cdiweb.com/ProductDetail/PG100N-UPRtek/618263/ Not a cheap toy, but looks like a nice hand held meter.
I also got word there is a new BEAST in town. I am ordering a tray today, but might not see them until mid-end of April. Citizen is coming out with a CLU059 3618. Max temp at both Tc and Tj are up and the max power is now 839 WATTS.
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Here's a 200$ version that probably doesn't have as many fancy screens built in but has surprisingly accurate results compared to an apogee and a li-cor.
https://www.bulkreefsupply.com/seneye-reef-monitor.html
 
it has a kelvin range monitor built in which tells you what the spectrum is, whats the difference between that and a spectrometer? I'm curious, thanks.
 
i have a uprtek mk350n, they come up on ebay now and again. i think i paid $650 for mine and another sold for that recently

heres one for $1300 OBO
https://www.ebay.com/itm/Open-Box-i...906389?hash=item4d707fd055:g:aFwAAOSwT2Naunn5

one for $1400 on amazon
https://www.amazon.com/gp/offer-listing/B00W84HT5K


mine and the one that sold recently were in same as new condition as those for ~$600 so you can haggle with the guy or wait

heres the one that sold recently. i already had one so i lowballed but if i didnt already have one i woulda bid $750

https://www.ebay.com/itm/UPRtek-Handheld-Sprectrometer-MK350N-PLUS-BARELY-USED-/222817403561?hash=item33e0f3c2a9:g:YpMAAOSwNMVaYmDu&nma=true&si=vxSOUvmI9CtTeCxy%2BPI3efRRV%2B8%3D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

another that sold recently in UK for $900USD

https://www.ebay.com/itm/UPRtek-MK3...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
 
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nc208 said:
it has a kelvin range monitor built in which tells you what the spectrum is, whats the difference between that and a spectrometer? I'm curious, thanks.
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kelvin range tells you nothing about the overall spectrum. you can get K from an overall spectrum plot but not the other way around

there are vastly different spectrums that can make a given K temp

look at a 3000K 80 cri cob vs a 3000K 90 cri cob vs a 3100K CMH, or a 2200K HPS mixed with a bit of 10000K metal halide vs a 3000K t5 tube

all can be ~3000K but have massively different spectrums to get there
 
@CobKits I am planning on preordering a tray later today or tomorrow. I am planning on getting a tray of 3000K/90CRI later today or tomorrow. I haven't looking to see where the price has landed for volume orders yet. Might be about to work something out on testing.
 
i contacted my guys at cecol to see whats up with US availability. I'm shying away from CLU058s for now they seem to be a lot more fragile ive had half a dozen gen6 drop rows (out of a few hundred chips). Did not see this problem with Gen5s. CLU048s are nearly indestructible in all cases and have better holder reflector and heatsink options. i think ive seen one bad 1212 out of literally thousands. with the new 1818s rated up to 420W you'll be hard to sell me on CLU058s for our application.

if they can really get a 6.5% efficacy increase across the product range, that would get the cheap 1212s up to the same level as the best that cree luminus and vero have to offer (currently). and the 1818s could be a real force. its hard to say because their test conditions assume high currents where most growers (yourself aside) dont run that way. so there may not be the touted 6.5% bump at low currents where dissipation isnt the controlling factor

luminus is also about to drop gen4 i wonder if they are also going to have substantially better dies. ive noticed the cxm22s ive been getting lately are lower voltage, ~52.5V at 1400 mA where before they were ~53.5V. its possible they are sliding out newer gen products under old part numbers like cree does sometimes with their bins. b-lux probably isnt far behind


as for the new 3618 an 850W cob driven full tilt is literally a drop in single point replacement for 1000W HPS. meanwell doesnt even have a good match for that that im aware of right now (esp at the ~120V the cobs gonna want)

even if the lumen maintenance sucks at that current the cost of a chip is the same as an HPS bulb and can be treated as such and flipped out every 8000 hours (with newer cheaper more efficient tech even)

here are new datasheets, they are showing 8750 mA/580W max for 1825 and 4200 mA /187W max on 1212s

http://www.leds.co.uk/products/led-components-indicators/citizen-chip-board-leds/high-current-cob
 
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i know that boards are all the rage but advancements like this is why ive been a major proponent of cobs on a standard package size. in the next 12 mos we will have new 28mm models of cree, luminus, citi, and probably b-lux and others. so any cob rig built in the last 5 years around this common package size will have an economical upgrade path just flipping out chips which will likely be in the $10 retail range for current tech soon enough. who knows which mfr will have the best tech but they are interchangeable so it doesnt matter
 
The Coolbay Teras should be able to safely cool about 500w of that COB. It was good to about 480w I was told (saw test video) on the GEN5 3618.
CobKits said:
I'm shying away from CLU058s for now they seem to be a lot more fragile ive had half a dozen gen6 drop rows (out of a few hundred chips). Did not see this problem with Gen5s. CLU048s are nearly indestructible in all cases and have better holder reflector and heatsink options.
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Were these using pads or paste? All test I did showed that I might as well have used nothing with the pads, though they were so much easier. I always go back to Arctic Silver 5. I haven't had a single complaint about the GEN6.
 
CobKits said:
i know that boards are all the rage but advancements like this is why ive been a major proponent of cobs on a standard package size. in the next 12 mos we will have new 28mm models of cree, luminus, citi, and probably b-lux and others. so any cob rig built in the last 5 years around this common package size will have an economical upgrade path just flipping out chips which will likely be in the $10 retail range for current tech soon enough. who knows which mfr will have the best tech but they are interchangeable so it doesnt matter
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Cobs really need more heatsink options that are readily avalible for the higher powered cobs. I feel the PCB design is just easier if your doing a lower wattage high efficiency build.
 
@CobKits What holders were they? I had HV 18g holders special order from Binder + Wirth. They don't/can't put the type of pressure on the COB as any other I have tried.
 
nevergoodenuf said:
The Coolbay Teras should be able to safely cool about 500w of that COB. It was good to about 480w I was told (saw test video) on the GEN5 3618.

Were these using pads or paste? All test I did showed that I might as well have used nothing with the pads, though they were so much easier. I always go back to Arctic Silver 5. I haven't had a single complaint about the GEN6.
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i use AS4 and ive seen them drop rows both in BJB holders and direct mounted to mechatronics iceleds
 
nevergoodenuf said:
I also got word there is a new BEAST in town. I am ordering a tray today, but might not see them until mid-end of April.
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CECOL says they are starting production in may and arent even taking orders till then. so nothing till june on my end

if you get some earlier and can spare one let me know
 
CobKits said:
will be interesting to see if they can back these up with LM80 data

seems like its a fundamental improvement in the dies made my Nichia so im wondering what other mfrs will be seeing these

@welight? who else uses those dies?

@nevergoodenuf where can i get one of those to test? can you split me one out and ill run it in the sphere vs the gen6. what color did you get?
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well niciha and off course the 757 is based on this tech
 
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