I was asked by my uncle to convert 22 units of gx53 LED Bulbs that are powered by 230VAC 5W to DC voltage power.
The LED Bulb itself consists of 5 LEDs(string) in series, in parallel to another 5 LEDs(string) in series.
I have disconnected the LEDs inside the Bulb from its inner driver and through a resistor i connected it to a DC power supply.
I learned using a measuring device(voltmeter) that each LED lights up with 8VDC and the current flowing through it is 8ma so the Bulb itself can be powered by 40VDC with current of 16~20ma.(5 * 8V=40V, 2 branches of LEDs * each branch is 8ma=16ma)
Now what i need is the right led driver.
I learned that LED drivers supply constant current while the output voltage is within a range of voltages.
So if i have 22 LED Bulbs that each need 20ma with 40VDC then the driver, to my understanding, should supply current of about 450ma with output voltage of at least 40VDC.
I ask for advice whether i'm right or wrong.