Wattage question

Hey all, I'm wondering if I can power 1 Vero 29 gen 7's(BXRC-35E10K0-C-73) with a meanwell hlg-240h-c2100. I'm broke and will be starting out small but start with things I can easily add more of later. My end goal is 4x BXRC-35E10K0-C-73 in a smal grow tent. But right now I'm limited to a oversized spacebucket(using 32 gal trash cans instead of 5 gal buckets). 1 Vero 29 plus led strips should be enough for that. So I'd like to get the bigger driver now and later buy additional veros to add.

Will a cob only use as much watts as it needs? Will running 1 Vero 29 with that drIver blow up the cob and be a fire hazard? If it does cause it to blow up can I use the dimmer set at 25-50%? I'd like to not have to buy a small driver for the one cob now only to have it become unused in a grow or two because I have added more cobs.

Bump

Hello,

BXRC-35E10K0-C-73 @ 2100ma needs around 70volt. The Driver hlg-240h-c2100 has @ output a voltage range from 59volt-119volt.

So you could connect 1* BXRC-35E10K0-C-73 to the driver, that would be no problem. But you should know, you could connect only 1 of this cobs to the driver not more.

2 of this cobs@ 2100ma would allready need around 140volt, but the drier has maximum voltage output from 119volt

Malocan said:

Hello,

BXRC-35E10K0-C-73 @ 2100ma needs around 70volt. The Driver hlg-240h-c2100 has @ output a voltage range from 59volt-119volt.

So you could connect 1* BXRC-35E10K0-C-73 to the driver, that would be no problem. But you should know, you could connect only 1 of this cobs to the driver not more.

2 of this cobs@ 2100ma would allready need around 140volt, but the drier has maximum voltage output from 119volt

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Thanks for the reply! I had overlooked that fact about the driver.

Looking around some more it seems that the 3500 c vero 29's are impossible to find. I'll likely go with BXRC-30E10K0-C-73 which has a voltage range from 66-74V and HLG-240H-C1750 which has a voltage range of 71 ~ 143V. Running those cobs at ~1750 should use about 69V each @ 118W. That seems like a better fit right? Will I be able to run just one cob off that driver for a while? Will running 1 cob blow up? Will a cob only use as many W as it needs? Or will a 240W driver dump all 240W into the cob?

Wicked0ne said:

Thanks for the reply! I had overlooked that fact about the driver.

Looking around some more it seems that the 3500 c vero 29's are impossible to find. I'll likely go with BXRC-30E10K0-C-73 which has a voltage range from 66-74V and HLG-240H-C1750 which has a voltage range of 71 ~ 143V. Running those cobs at ~1750 should use about 69V each @ 118W. That seems like a better fit right? Will I be able to run just one cob off that driver for a while? Will running 1 cob blow up? Will a cob only use as many W as it needs? Or will a 240W driver dump all 240W into the cob?

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I think both cob which you mention, has both the same voltage range. They are both "C" version.
@ 1750ma they need around 69,5volt at 25C tc

Malocan said:

I think both cob which you mention, has both the same voltage range. They are both "C" version.
@ 1750ma they need around 69,5volt at 25C tc

View attachment 3855772

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You're right about that! So one of theme requires about 69-70V and will use around 118-120W @ 1750mah. So 2x the cobs would be 136-140V and 236W @ 1750mah. So the HLG-240H-C1750 would be enough for 2x the cobs(I think).

Do you think this would be ok?

Wicked0ne said:

You're right about that! So one of theme requires about 69-70V and will use around 118-120W @ 1750mah. So 2x the cobs would be 136-140V and 236W @ 1750mah. So the HLG-240H-C1750 would be enough for 2x the cobs(I think).

Do you think this would be ok?

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yeah the driver would be good fit for 2 cobs, but you must run 2 cobs at this driver, you cant start with just one cob and add later another one.
Because voltage range of driver is 71-143 and one cob at 1750ma use around 69,5volt. So one cob would be not enough, but 2 cobs fit good

Malocan said:

yeah the driver would be good fit for 2 cobs, but you must run 2 cobs at this driver, you cant start with just one cob and add later another one.
Because voltage range of driver is 71-143 and one cob at 1750ma use around 69,5volt. So one cob would be not enough, but 2 cobs fit good

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Thanks a lot for the information! That was one thing I was unsure of; the cob can handle 71V but at that amperage(1750) it was using 69.5V. The numbers are very close so I didn't know if there was a "fudge" factor and it would work. I guess it does not! Trying to find the right setup for my needs is harder then I expected!

Hmm. I've dug a little deeper and I'm wondering if I have this right.
The Bridgelux datasheet shows the C-7x versions can use between 64.2-69.74.6V @ 1710mah and between 68.8-80V @ 3420mah. I assume those ranges are the absolute minimum to turn on and maximum to run safely.
The Meanwell datasheet lists the HLG-240H-C1750 with a min/max of 71-143V. So would the minimum 71V on the driver be ok to run 1 C-7X cob? Bridgelux does list their min/max for that series from 64-74V.

I'm really determined to make my idea work!

Wicked0ne said:

The Bridgelux datasheet shows the C-7x versions can use between 64.2-69.74.6V @ 1710mah

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this voltage # are for a tc range from -40 degree celsius to + 105 degree celsius. The tc of your chip should be between 50-80 degress celsius i think (im not sure about that). So "your" chip @1750ma (tc=around 50 degree celsius) should need around 69,5-68 or even less.

As soon the Tc temperature from your chip rise, the voltage will drop.
And if the Tc from you chip got colder then the voltage rise.
This you can also see on the chart/datasheet which you posted.

Wicked0ne said:

So would the minimum 71V on the driver be ok to run 1 C-7X cob? Bridgelux does list their min/max for that series from 64-74V.

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i would say no, but maybe im wrong someone else should check it

Malocan said:

this voltage # are for a tc range from -40 degree celsius to + 105 degree celsius. The tc of your chip should be between 50-80 degress celsius i think (im not sure about that). So "your" chip @1750ma (tc=around 50 degree celsius) should need around 69,5-68 or even less.

As soon the Tc temperature from your chip rise, the voltage will drop.
And if the Tc from you chip got colder then the voltage rise.
This you can also see on the chart/datasheet which you posted.


i would say no, but maybe im wrong someone else should check it

Click to expand...

Ah, so much stuff to be aware of. As a noob it's a lot to soak up! I'll see if anyone else chimes in.

Thanks again for answering me! I really do appreciate it!

1750 wouldnt work, your cob (or cob array) would have to be *at least* 71V for it to light up

C vero is 68-69V at that current (depending on case temp)