Adjusting driver - Pros, cons or doesn't matter

[Fawkes420]

Hi.
I have watched the new youtube video from LEDG (btw, very good video) about Meanwell hlg cv driver and i have some questions.

Pros and cons for the metods of dimming?
In the video LEDG says adjusting the vo to dim(around 22:00), but i have seen another way to dim by adjusting the Io.
See pic.

Is there any difference or is the one as good as the other?

[LEDG]

I’ve given this a great deal of thought in recent months and I think leaving the current is the safer way to do it. Either way will get the job done.

I wish I could annotate old videos to reflect new info.

[Fawkes420]

I’ve given this a great deal of thought in recent months and I think leaving the current is the safer way to do it. Either way will get the job done.

I wish I could annotate old videos to reflect new info.

Thanks! I will apply your new findings on my setup.

[Fawkes420]

One thing i noticed.
Now you can dim down more than just to 50% when using to vo to adjust.

[LEDG]

One thing i noticed.
Now you can dim down more than just to 50% when using to vo to adjust.

Yup, by using the VO you can reduce it further.

[Pickll]

Hey sorry for hijacking but I have a quesrion regarding to adjustments.

I just tried to dim my Hlg-120h-24a and when I play with the Vo Adj nothing happens to lights(on minimum io or maximum io) but when I play with the Io button the light gets dimmed.

So the Vo doesnt do anything regards to output power of the strips ? So whats the point of it ? Will watch the video when I have a chance.

[LEDG]

You’re using Bridgelux Gen 2, correct? That would likely be due to the fact that you’ve got them running on a 24V driver when they’re intended to be run closer to 20V. When you lower your VO, they’re still pulling all the driver current since they’re current-hungry even at the min. voltage of your driver so lowering VO does nothing. In your case, IO will work.

[Paulie109]

i just received my first constant voltage driver. the hlg 600h 54a . i have a bunch of cc drivers and my question is what are the sml. brown, yellow and black wires for on the right side with the dc out wires. will have them running 4 qb 288's 2700k for flower in a 4x4.