What are the pros/cons between 38.7V, 52V, and 69.4V

[DJM0007]

Hey everyone,

Can someone explain the pros/cons between the Vero29's Gen 7 COBs
(Why pick one over the other B/C/D?)

In a 2' x 2' cabinet, shooting for a a range of 200-400 watts (dim-able capabilities)
Max of 4 COBs, and 1 Driver initially unless someone can show me why not.

The plan is 4x Vero29 Gen7 COBs Part # BXRC-35E10K0-D-73 (2.1A & 38.7V)
Paired to a single Meanwell Driver Part # HLG-320H-C2100-B

This allows for 325W at 2.1A (and 154.8V)
Also it allows for 162.5W at 1.05A (and 154.8V) when dim'd

This combo just seems built for each other...


This combo also allows me to do other things in the future (such as change COBs using the same driver)
A lower Amperage driver has less capabilities to do this. (you can go down but not up in amperage)


Can someone argue why they would go with one of the other versions Vero29's?
(even with different driver if needed)
Such as these two below:
Part # BXRC-35E10K0-B-73 (1.8A & 52.0V)
Part # BXRC-35E10K0-C-73 (1.71A & 69.4V)

Also what about the other Drivers? With lower currents?
I think it is best to pair the driver to the lights current, although I know you can run them at lower Amperages for higher efficiencies (which is not my prime concern)

For example, You could run the Vero 29 Gen 7 Version B @ 1.8A paired to a meanwell 1050amp driver?

I can not see why one would want to mismatch these,other than if you are just shooting for highest efficiencies. Someone Please enlighten me.

Does any of this have to do with some combinations are High Voltage low amperage and the others being Low Voltage High Amperage?

As long as nothing is overloaded and safety is followed, I cant see the problem here either way?

Thanks!

 

[Shugglet]

Start ordering. Youll be happy.

 

[DJM0007]

Thanks! And that is what I plan to do soon!
But I still would love to learn the theory/reasoning on why some people are doing it other ways

So what is the main difference when running high voltage/low current verse low voltage/high current?

 

[Shugglet]

So what is the main difference when running high voltage/low current verse low voltage/high current?

What driver you can choose...

 

[DJM0007]

That is what i thought!
Watts is Watts, and anything past that is just efficiency... correct?

Efficiency will tell you the amount of heat it will produce, but after than what are the differences?

Alot of the other combinations seem to not be at the prime "sweet" spots of the Drivers either (although im sure it is not that much reduction)

 

[85300zxcob]

All the charts I have read seem to show the cons being more efficient at lower drive currents. Fluctuation doesn't seem too bad but at higher amperage there seems to be higher heat to photon ratios. Check the specs on those cobs at different drive currents. Also the distance to the plants may need to be increased at higher drive currents.

 

[CobKits]

69V is a different die layout and is more efficient at all wattages, which is why it costs substantially more