I've got few of these LEDs which are in a 3S3P configuration and rated 9-12V 900-1050mA. I tried to power one of these with this module which I earlier set at 12V and 1A with a multimeter in short circuit.
The problem is that when I connect the LED in series with the multimeter, the latter tells me that is drawing less than 400mA.
So, out of curiosity and willing to fry one LED, I connected it directly to a power supply (a laptop brick, 12V 3A) and the LED doesn't draw more than 600mA. More LEDs in parallel gives me these values:
- 2 LEDs: 1200mA
- 3 LEDs: 1600mA
I'd like to push the rated current through the LEDs (so to take them to full brightness), also is weird that seems like they're current-limiting themselves without the need of a constant-current circuit.
Does anyone have any explanation/experience with this behaviour?