Sounds like they are power factor corrected, nice!It fluctuates between 1.0 and .99 constantly and quickly
Holy crap!!!! 80???? You are building a monster!!! Its probably buried in the previous 47 pages but what is your proposed plan for them?Just got the confirmation... the 80 pcs 3070 3000K's AB's are mine... And a bunch of chiploks.
Well, I did not decided yet. Wanted to grow with 8x or 6x 600 watt hps, but this thread convinced me that led is the better option for me. So now I am going for led, first 40 pcs @50 watts with active cooling. Did not decide how to build those 40 by the way.Holy crap!!!! 80???? You are building a monster!!! Its probably buried in the previous 47 pages but what is your proposed plan for them?
How weird is this. XML2 running at 700mA, Vero at 350mA.View attachment 3160862
I have noticed that the CXA3070 Z2 bins I have tested are just over 38V at 1450mA but the Z4s are 39.5vF at 1450mA. I wonder if that would be a problem for these drivers. Looks like the Z4s could be over 40vf at 1550mA. Maybe I can one from them for some testing.I made contact with a chinese company who made me drivers with a custom current(1600mA) at 38 volts or something like that. It is perfect for the CXAs because they were basically made for them. I'll take a picture of the driver when I get a chance! Tested with a multimeter they put out 1550-1580mA at thermal equilibrium.
I have now a Z4 and next week I have a bunch 3070 AB's, will test them for youI have noticed that the CXA3070 Z2 bins I have tested are just over 38V at 1450mA but the Z4s are 39.5vF at 1450mA. I wonder if that would be a problem for these drivers. Looks like the Z4s could be over 40vf at 1550mA. Maybe I can one from them for some testing.
CXA3070 Z4 / Tc=45°C / Io= 2070mA : Vf=39.5 V measured at driver's output pins .
( > 6hours continuous operation. MeanWell HPL-80H-42 )
Heatsink base thickness: 10 mm ( 1 cm )Wow sds...45*c at 2a? My coolest one was 41c at 1a. The base of your heatsink looks a bit thicker than mine...I wonder if that is making the difference.
Could also be the way I tested the junction temp. I just used kapton tape to secure the probe. I think the probe might have been picking up the radiant heat from the cob
I did the testing on a bench and the driver was about 1 foot away from the LED. It may be that I just happened to select a COB with a particularly high vF. Also, that was at Tj25C so the vF would be about .25V lower once warmed up. I will test a few more Z4s and Z2s to see if that was just a fluke.I checked my voltage and I am running at just under 38 volts. I think the reason your voltage is higher is because your drivers are remote and you might have voltage drop over that long distance( however long it is). My LEDs are also Z4.
Good info thnx SDS. So based on this, the 40vF 1550mA drivers should be no problem for any of the CXA3070s.CXA3070 Z4 / Tc=45°C / Io= 2070mA : Vf=39.5 V measured at driver's output pins .
( > 6hours continuous operation. MeanWell HPL-80H-42 )
View attachment 3162597
the note under the figure cleary states 3000K; 4000K; 5000K for the given graphs
View attachment 3162598
cree on the other hand gives us a range (3700K-5000K), but not say which colortemp it is exactly.
here is a graph of a warmwhite(2700K) with 17%(W) blue.
View attachment 3162600
white with a touch of pink in my eyes.
Valoya uses two different types of (proprietary ) phosphor conversion leds (COBS ? ) in various combos .Valoya AP67 – General Growth Spectrum
For vegetative and generative growth. Performs very well with a large variety of plants,
ranging from cucumber and tomato to lemon trees and even snow algae.
It provides strong vegetative growth and early flowering of plants.
With some leafy green plants elongation is achieved,
while with some flowers the growth result is a compact
plant. The AP67 spectrum has also been shown
to promote quick and good rooting. The AP67 is
strong on far-red (about 18 % of the total radiation) and has no uV radiation.
Suggested use:suitable for most vegetables e.g.
cucumber, flowers and tree seedlings. Also positive results with algae.
Appearance to humans:Pinkish light, quality
control possible, good working environment.