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if you wire your 5th cob in series - you drive all the current (2100mA) through it - and then you split it up in 2 series of 2 CXB ? --- you should measure a Vf close to 100VDC o_O can you take a pic of your wires ?

i guess we will see something like that driverless means: cheapest version to drive this spectrum ~ 1800K / (i guess) not dimmable - and so they are not able to drive a flip-chip efficiently. It is ways better to buy these red phosphor chips in a 100W version with Vf 30-36VDC / If...

:peace: if you start your fixture at very low ambient- or led temp. --- with Vf too close to the open circuit voltage(105V) - you may see your lamp blinking (Shut down o/p voltage, re-power on to recover) - because low temp. ---> higher Vf in case - you can dimm your driver a bit down - or...

:peace: always check the open circuit voltage of your driver - and then try to get as close as possible to drive out full load. You can always add some adequate led-chips into the row, if you want a higher Vf

:peace: @ZioFrancolino --- You can buy 2/3or4 x 200W / Quad-boards for € 82,-/ 111,-/ or 138,- in Germany no heatsink needed if P < 60W https://www.lumen-laden.de/products/quad-board-400-leds-smd5730-200w/

it remember to my haircut when i was 21y - i would take it to the hairdresser and ask a DDT- cut (Dumb-Donald T. - cut) and make the picture again.

When democracy began in Greece 2000 years ago, citizens needed diputates to send their opinion to the capital of the state. Today, in a highly communicated society, it seems strange that my opinion reaches neither the Diputat nor the central administration By law, I am required to send my tax...

my boiler is hanging in between my 2 grow chambers connected by ~3m 8mm hose. my bathroom is ~ 8m far away - i connected 2 x 8m garden hose (cold in - hot out) to the boiler and taking a shower i have to carry both hoses to the shower - click&plug cold in to the cold water und push the hot...

in the moment i use an electric boiler with integrated heat exchanger (80L, € 165,-) I never use the plug to heat up the water - with ~ 300W watercooled led light during ~15h (4,5 KWh) i can prepare my daily need of ~80L / 2 pers. With a closed loup and 3W aquarium pump (200L/h, 0,3bar) so i...

another 2000W ?

:o:shock::o

my tiny pump can do 200L / h / 3m head hight and only use 2,7W in a closed loop. in my 1,8m² grow chamber i need 4 additional fans(3W / 126m³ph) // 2 fans pulling air through the carbon filter and 2 others to move the air - o,3 sone - no heat no noise even in summer. 14,7W in total for...

:?::confused::idea::shock::arrow:

...and I want to tell them how to go ! if you put your own plans on ice ... that`s your problem. I live in similar circumstances as you - rented appartment, bathroom on the other side... if you pay $ 15,- for hot water - after one year the price of a heatexchanger has amortized. The following...

NI是z洪UO人马 --- makes my horse nervous

you constantly tell bullshit to the people the heatsink of my watercooled fixture beats anything in upfront cost, that use aircooled heatsinks. My additional energy consumption is a 3w aquarium pump and is able to manage up to 2000W lamp fixture(US$ 40,- without chips+driver), if i want. - 3w...

in my country even a cheap KWh cost US$ 0,30

nobody can follow your rule the capital investment = the price for an additional chip the payback period depends on the price and quantity of your KWh eg. with 25 cent/KWh // 6000h/year 1000W led lamp with 20 x CXB3590 / 140LM/W / US$ 900,- // electr. cost = US$ 1500,- / year replaced by...

problablay this is a bit more than CXB3590 2700K 90CRI typ [10062] = 88,7LM/W @ max. current I still recommend to buy quantities in asia before buying hot air in USA.