Vero vs. CXA

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fluns

Member
Best efficiency and result setup for a horizontal + vertical LED setup?

horizontal: -> activ or passiv cooling
- cxa 3070 (Z4 or AB -> Z4 much cheaper)
- vero 28

vertical: -> passiv cooling
- cxa 1304
- vero (18?)

Vero 28 has more lm/watt but is the quality / result as well better compared to the cxa 3070?

Passiv cooling for the cxa 3070 / vero 28 possible -> makes sense (less lm/watt if too hot)? activ better?
 
bicit

bicit

Well-Known Member
The CXA has a slight effeciency advantage at low currents. The vero line has a slight efficiency advantage when driven hard.

The smaller CXA chips aren't very efficient compared to the smaller vero chips (10, 13, 18)

CXA chips are binned, the higher bin chips are noticeably more efficient. They can be a bit of a pain to track down. The vero lineup is not binned, all the chips are generally the same.

The vero line has solderless connectors and a cob holder built in. If you're drilling and tapping the vero line has a huge price advantage. If you're using kapton tape or thermal adhesive then this perk is negligible.

Check out the heatsinks for DIY led chips thread. Lots of good info on cooling options. 90cm^2 of surface area per watt is good for passively cooling cobs. 30cm^2 per watt is good for active cooling
 
F

fluns

Member
bicit said:
The CXA has a slight effeciency advantage at low currents. The vero line has a slight efficiency advantage when driven hard.

The smaller CXA chips aren't very efficient compared to the smaller vero chips (10, 13, 18)

CXA chips are binned, the higher bin chips are noticeably more efficient. They can be a bit of a pain to track down. The vero lineup is not binned, all the chips are generally the same.

The vero line has solderless connectors and a cob holder built in. If you're drilling and tapping the vero line has a huge price advantage. If you're using kapton tape or thermal adhesive then this perk is negligible.

Check out the heatsinks for DIY led chips thread. Lots of good info on cooling options. 90cm^2 of surface area per watt is good for passively cooling cobs. 30cm^2 per watt is good for active cooling
Click to expand...
thxs :) (vero 29 not 28.. sry)
want to drive them around 25 - 50% (vertical if cxa1304 250 / 350 mA) for more efficiency .
-> so i should go with the cxa3070 right?
-> for vertical LEDs -> vero 10 > cxa1304 but vero's aren't very good dimmed right? cxa1304 dimmed (250mA) better Efficiency than vero 10?

Is more lm/watt in general better ("Lumens are for humans..")? Thought it depends on other things (CRI/nm...)?
 
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bicit

bicit

Well-Known Member
fluns said:
thxs :) (vero 29 not 28.. sry)
want to drive them around 25 - 50% (vertical if cxa1304 250 / 350 mA) for more efficiency .
-> so i should go with the cxa3070 right?
-> for vertical LEDs -> vero 10 > cxa1304 but vero's aren't very good dimmed right? cxa1304 dimmed (250mA) better Efficiency than vero 10?

Is more lm/watt in general better ("Lumens are for humans..")? Thought it depends on other things (CRI/nm...)?
Click to expand...
Aim for 35-50 watts of actual displacement per square foot over the canopy with either the CXA 3070, CXA 3590, or Vero 29.

The vero 10's are much better than the 1304. However smaller led's would probably be better suited for sidelighting. Something like the XM-L2, just as efficient when driven soft, but much lower intensity. The cobs would be to 'concentrated' IMO.

Lumens are for humans, but it 'works' when comparing white light sources like cobs. It's generally agreed that the 3000k cobs work well enough.
 
F

fluns

Member
Want the vero 10 / cxa 1304 maybe for veg or other plants (maracuja, chili..) -> vero 10 is better even if dimmed?
What version of the vero 29 is the best? there are five versions on digikey - only for 3000K
-> CRI: 80/90/97 -> 80 is the best right?
-> 38,6V vs 29,5V -> 29,5V with 122lm/watt best?
 
caretak3r

caretak3r

Well-Known Member
inexpensive side lighting option - buy 5630 or 5730 SMD strip lighting and run them soft. You can sometimes get 5M as cheap as $5. If you connect the entire strip to a 12V power source it'll pull about 30W and will put out negligible heat. If you connect it in shorter sections you'd need to use a dimmer to drive them softer. You can get a 5M strip to pull about 100W but you don't want to because of so much heat (inefficient).
 
F

fluns

Member
Can anybody name me the efficiency of the Vero 10 and cxb 1304 compared at 210 - 350 mA?

Have found the efficiency sheet of @SupraSPL for the Vero 10 but no analysis of the cxb 1304....
 
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