Questions about COBs and power supplies from a beginner farmer

Hello,
I'm planning to use Citizen 1212 COBs, but I don't know how they can be used on 70 watt for each one of them, knowing that each unit will have 5 COBs. So my question is: what is the right power supply for me to run these on parallel? And if they were installed on it directly without any circuit controlling the voltage or amperage, how many volts/amperes will they be using?

Man....


The big chips are 54v. Buy the driver that the model number ends with '54'.


Dimming is by potentiometer. Either external or internal. An 'A' model driver and a 'B' model driver.

Typical voltage with 54volt chips is between 48volts and 53.3volts.

The 1212s are not 54V, they're 36V

The citizen cobs modelnr relates to it's voltage: 1212 is 12x strings of 12 leds in the chip, each led being about 3V nominal=36V.
All clu12xx would have 36V nominal approx, the clue 18xx have nominal of around 48-50V, for 18 leds in series for each string.