V series "Tetras"

A new light ...
Still under design .....

Some info ...

LED : 4x Bridgelux Vero 29 BXRC-30E10K0-L-X2
Drivers : 4x Meanwell HLP-60H-42 *
Fan : 1x 140 mm Phanteks PH-F140XP
Pwr Adjust : 1x 12 position Rotary Switch

* Meanwell HLP-60H-42 :
Efficiency @100% LOAD (230 VAC) : 91%+
3in1 dimming feature
1,53 A max output .

pd...wait...4 drivers...and driver for fan... ...new case...

saludos

stardustsailor said:

A new light ...
Still under design .....

Some info ...

LED : 4x Bridgelux Vero 29 BXRC-30E10K0-L-X2
Drivers : 4x Meanwell HLP-60H-42 *
Fan : 1x 140 mm Phanteks PH-F140XP
Pwr Adjust : 1x 12 position Rotary Switch

* Meanwell HLP-60H-42 :
Efficiency @100% LOAD (230 VAC) : 91%+
3in1 dimming feature
1,53 A max output .

Click to expand...

How did your experiment with dimming cycles go?

congratulations SDS for a new lamp, the specifications are excellent ...
now I'm going to read the fan spec, what you will use as a heatsink?

bicit said:

How did your experiment with dimming cycles go?

Click to expand...

Not good.
Not because of the DND system directly,at least.
I'm facing some serious trouble to keep the ambient temperature above 18-19 °C .
So ,I've actually disengaged the DND system (Temps can not rise else .)
Even with the system disengaged and the two Vero 29 driven @ 1,15 A ,the temps remain close to 19-20 °C .
Growth is really slllloooooowwww ...
Still ...
Fairly "green ",quite compact and healthy enough.
(To remind you the quantum flux distribution to wl bands ,of the 3K,80Ra Vero:
BL 400-499nm : 10,6% - GR 500-599nm : 40.7% - RD 600-699nm : 44% - FR 700-800nm : 4,7%
and some photomorphogenic parameters : R:FR = 6.27 -- PPS(PPE)= 65.72% )









(Pots are ordinary 5 liter paint buckets .)


Cheers.

zangtumtum said:

congratulations SDS for a new lamp, the specifications are excellent ...
now I'm going to read the fan spec, what you will use as a heatsink?

Click to expand...

Same heat sink I've been using.
Hellas is one of the biggest exporters of raw aluminium in the world.
Here this metal,is relatively cheap,compared to it's price in other countries.
In fact ,I can't find anywhere else in the whole world ,
a heatsink made of almost pure aluminium (Al Alloy 1060 or AA1050 ),
like the ones I'm using .It seems that most of heatsinks available on market,
are made of harder alloys like 6061 or similar.
Still ,those alloys do not have the thermal conductivity of the more "pure" aluminium -softer- alloys.
So,I do not see changing easy my heatsink choice.That heatsink I'm using is quite rare ,to find ,in fact .
From what I'm aware of ,in fact,one can find that heatsink ,only in one place ,all over the world.

SDS, if I am reading that graphic correctly, it shows oure AL to have thermal conductivity of 400. But every source I have looked at says 200-250(W·m−1·K−1) ?

SupraSPL said:

SDS, if I am reading that graphic correctly, it shows oure AL to have thermal conductivity of 400. But every source I have looked at says 200-250(W·m−1·K−1) ?

Click to expand...

..Still ,I think myself is pretty high ...
Anyway ..
Some info on Aluminium alloys :

1100-O
1100-H14 : Commercially pure aluminum resistant to chemical attack & weathering, low cost, ductile for deep drawing & easy to weld, used in chemical equipment, fan blades, sheet metal work.

6061-O
6061-T4
6061-T6, T651 :Good formability, weldability, corrosion resistance, & strength in the T-tempers, good general-purpose alloy used for a broad range of structural applications & welded assemblies, pipeline, marine applications, furniture, agricultural applications, aircraft's, architectural, building products, chemical equipment, electrical and electronic parts, fasteners, general sheet metal, recreation equipment, storage tanks

http://www.esm.psu.edu/courses/emch13d/design/design-tech/materials/aluminum_alloys.html

Aluminum Grades Series 1xxx

These grades of aluminum (1050, 1060, 1100, 1145, 1200, 1230, 1350 etc.) are characterized by excellent corrosion resistance, high thermal and electrical conductivities, low mechanical properties, and excellent workability. Moderate increases in strength may be obtained by strain hardening. Iron and silicon are the major impurities.

Aluminum Grades Series 6xxx

Aluminum alloys in the 6xxx series (6061, 6063) contain silicon and magnesium approximately in the proportions required for formation of magnesium silicide (Mg2Si), thus making them heat treatable. Although not as strong as most 2xxx and 7xxx alloys, 6xxx series aluminum alloys have good formability, weldability, machinability, and relatively good corrosion resistance, with medium strength. Aluminum grades in this heat-treatable group may be formed in the T4 temper (solution heat treated but not precipitation heat treated) and strengthened after forming to full T6 properties by precipitation heat treatment.


http://www.keytometals.com/KO/page.aspx?ID=AluminumGrades&LN=EN



At least ,I can say something good and positive for my country.
Or not exactly ,come to think about it better...
Probably the small factory (really small ,I mean it ) that makes the heat sinks I use ,
chooses 1050 for economic issues,rather because of it's properties .

( aluminium alloy 1050 ,here for a private machinist ,
cost a bit less than 1 € per kilo {~ $1 / 2lbs } ,when alloy 6061 has an average price of 1,5 -1,8 € per kilo) ,

Still,I kinda like the "cheap first material" politic chosen by the firm ...
Most of the rest heatsinks in the rest of the world are made by the more expensive 6061.
Easier to find ,easier to extrude ,not so soft to be mechanically damaged and many more ...

(Oh,yeah..Forgot to mention that ...If one blows air with his mouth on a heatsink made out of 1050 alloy,it will probably leave scratches -blow marks on the metal ..Ok,I'm kidding ..But it is way soft alloy,almost pure aluminium .Not so many uses around.Mainly used as "first material" turned to another series of alloy,like 6061 ..1050 gets easily ,bended ,twisted,chipped ,sanded ,mirror polished and scratched back again,in less than 5' ,just by handling it -a tad carelessly maybe ...)

All better but one ....
The most crucial for the case ...

1050


vs
6061




http://aluminium.matter.org.uk/aluselect/03_physical_browse.asp

Cheers.

What are the dimension of your heatsink? I'm wondering if Heatsink usa has anything in a comparable size to test if it makes much of a difference.

I have been interested in this product from Heatsink USA:

Product Description
Extruded Aluminum Heatsink
Alloy: 6063-T6Width: 4.600"
Fin Height: 1.451"
Base: .230"
C/W/3": approximately 1.4
Weight per Inch: .314
Weight per Foot: 3.768


http://www.heatsinkusa.com/4-600-wide-extruded-aluminum-heatsink/

bicit said:

What are the dimension of your heatsink? I'm wondering if Heatsink usa has anything in a comparable size to test if it makes much of a difference.

Click to expand...

I've already tested it against a similar sized heatsink (exact same to be precise ) from
Fischer Electronik ,the SK85 at 100 mm length.
For comparison I've used a 100mm option of the heatsink I use ( ST10 from Normabox ) .

The SK85 has a thermal resistance of 0,85 C/W,when black anodised and a retail price of ~22 euros.
The ST10 has a thermal resistance of 0,6 C/W,when black anodised and a retail price of ~10 euros.
The actual temperature difference was about 1,5 C for the same ~25 W of Q load.(
PASSIVE ,fins perpendicular to ground)

Then again I've tested the ST20 (the one I'm using of 200 mm length ) with the-again exact same sized and shaped- ABL 159AB .
http://nl.rs-online.com/web/p/heatsinks/2342463/

The 159AB has a thermal resistance of 0,55 C/W,when black anodised and a retail price of ~34 euros.
The ST20 has a thermal resistance of 0,3 C/W,when black anodised and a retail price of ~25 euros.

The actual temperature difference was about 4 C for the same ~25 W of Q load.
(PASSIVE ,fins perpendicular to ground).

SketchUP2015 actual size model inside .zip folder.

http://www.normabox.gr/website/product_info.php?cust_id=10303&template_id=&lang=gr&cPath=9&cust_id=10303&template_id=&lang=gr&cPath=9&products_id=22&lang=en

coolbreez1 said:

I have been interested in this product from Heatsink USA:

Product Description
Extruded Aluminum Heatsink
Alloy: 6063-T6Width: 4.600"
Fin Height: 1.451"
Base: .230"
C/W/3": approximately 1.4
Weight per Inch: .314
Weight per Foot: 3.768


http://www.heatsinkusa.com/4-600-wide-extruded-aluminum-heatsink/

Click to expand...

Why they use tempered T6 ,escapes my logic...
Untempered 6063 0 is of much better thermal conductivity ...

...maybe for fisical characteristcs... ...tempered ...more solid or rigid for transporting... not?...

pd... sorry...2 hours more where I live... i must remember this...

saludos

salmonetin said:

...maybe for fisical characteristcs... ...tempered ...more solid or rigid for transporting... not?

saludos

Click to expand...

Who knows ? I can't think something,right now..
(It's rather late here... )
You might be right in your assumptions ...

Cheers.

salmonetin said:

pd... sorry...2 hours more where I live... i must remember this...

saludos

Click to expand...

No worries,Salm..
Today's Saturday ,outside is raining ,my girlfriend (yes) she's lightly snoring (!) at the couch
(too many joints,she had ,as always)..
And I've made myself a cup of a weird tea mix I've found (probably from an ex,so far beyond it;s expiring date ... )..
It smells good and fruity ,though ..
And just lit up a big fat joint full of my favourite White Russian and some Karelias tobacco ..
No ,i do not feel sad or the least guilty about my lungs ...
They do not deserve such treat -i know all about it- ,but the rest of me ,does really..

Anyway ..
Some post mid-night saturday fever's thoughts....


-The more I work with the Vero 29 arrays ,the more I fall in love with them ...
I mean ,they just need four M3 screws to be securely attached to a heatsink .
The contact force achieved is high enough .No horrible spring-action holders !
Cooling them is another issue ,that is almost jaw dropping .
Ok they have 156 dies under a 29 mm Dia. LES ,so of quite low density ,a COB array ...
Nevertheless ,the aluminium substrate is rigid and durable enough ,while it posses a high thermal conductivity.
Thus the 0.11-0.13 C/W thermal resistance from junction to case ...
Amazing COB ...A "noble monster" ...A "kind giant " ...

Haven't actually measured with a lux meter ,but to my eyes the difference in brightness ,
between a VERO 29 and a CXA3070 Z4 bin @ 2200 mA ,is quite noticeable.Maybe more than that .
The Vero 29 really seems to be outputting much more light ...And ,trust me ,it's not just me saying that ,is plenty of people
,close friends and relatives ,suggesting same,when witnessing the comparison ...


-Anyway.Change of subject.

Joint's side -effects you see...

BTW ..

"Lux meter "...

Is it just stupid me or if one has digitised the relative spectral power distribution graph of a LED or COB ,into y values /nm and have them further "analysed" in a spreadsheet then .....
Then ...

If one uses a lux meter or similar ,but not a PAR meter ...
If the units measured by the hand-held equipment are lumens or lux (lumens/m^2 )
Then ...

If really that hand held measuring device's sensor is CIE1924 Photopic V(λ) calibrated ..
One can transform the readings ,via the spreadsheet ,into Watts ,W/m^2o, umol/sec or umol/sec/m^2 ..
With quite good precision ..

And correct me if I'm wrong ...
PAR meters are way much more expensive( ten fold the price ? ) than Lux meters ,ain't so ?
Hmmm...

How come ,I haven't thought that before ?
A good luxometer ...Photographers' equipment and parafernalia then ....

https://www.trotec24.com/en-de/measuring-instruments/emission/bf06-lux-meter.html?gclid=CNvVjuCqq8MCFWPmwgodRxsAkQ

coolbreez1 said:

I have been interested in this product from Heatsink USA:

Product Description
Extruded Aluminum Heatsink
Alloy: 6063-T6Width: 4.600"
Fin Height: 1.451"
Base: .230"
C/W/3": approximately 1.4
Weight per Inch: .314
Weight per Foot: 3.768


http://www.heatsinkusa.com/4-600-wide-extruded-aluminum-heatsink/

Click to expand...

That particular heat sink is what my flowering overhead light is built around. I bonded 3 lengths together to make a 13.8" wide sink. It does very well to cool 15 Vero 18s, 10 Cree XPLs, and 28 Luxeon ES deep reds (~360w) at 700ma. I have 2 120mm fans running a 1200rpm cooling the sink. It always feels cool to the touch.

Here's a picture of it before I upgraded to Meanwell dimmable drivers and XPLs between the Veros.

Mechmike said:

That particular heat sink is what my flowering overhead light is built around. I bonded 3 lengths together to make a 13.8" wide sink. It does very well to cool 15 Vero 18s, 10 Cree XPLs, and 28 Luxeon ES deep reds (~360w) at 700ma. I have 2 120mm fans running a 1200rpm cooling the sink. It always feels cool to the touch.

Here's a picture of it before I upgraded to Meanwell dimmable drivers and XPLs between the Veros.View attachment 3337831

Click to expand...

Good job !
Stainless steel frame is what I'm seeing ?

stardustsailor said:

Good job !
Stainless steel frame is what I'm seeing ?

Click to expand...

It's all aluminum. I had the shroud cut and bent to dimension by a local metal fab shop. It's whatever they make tanks of. If I remember right it's 6061.

I was thinking I might be able to build nice heat sinks with that stuff from Heatsink USA for less then the Alpine 11 ones. At C/W/3": approximately 1.4 I was thinking that I would need about 2 inches of it per Vero 29 with some form of active cooling.

Assuming 6 LED Array, I would be aiming for less then $60 for heat sinks, the cost of the arctics. So two 6 inch sections of that with one fan each would be $27 for the heat sink, plus the fans and shipping, might come in around $45 for the heat sink portion of the light with reduced power consumption because it would only need 2 fans instead of 6?