Advice on my upcoming LED Build

[patrikk]

Hi all,

I must say I am impressed with everyones DIY LED builds, so thats why I want to make my own ( because you guys inspired me).

My build setup:
9 CREE XP-G R5 Cool White run at 1000mA
10 CREE XT-E Royal Blue run at 700mA
1 CREE XP-E Blue run at 700mA
1 CREE XP-E Green run at 700mA
1 CREE XP-E Red run at 700mA
3 UV LED (the ones at rapidled) run at 700mA
1 LDD- 1000H for CW
5 LDD- 700H one for each of the other colors

powersuply Meanwell HLG-240H-36A

all the above will be multiplied by two

1 Arduino uno
1 ethernet shield
1 pwm breakout ( 14 channels)
1 RTC breakout

When it comes to heatsinks I've been looking at a few a rapidled heatsinkUSA makers etc.

I know that some have anodized heatsinks does that really matters in our builds or not?( I know what the anodizing does).

My biggest concern is the powersupply if it will be good enough for this purpose or not. and the heatsink. I've also been thinking of designing my own heatsink and ask a school in my town if they could CNC one from my own design.

Comments and feedback would be great. Thanks!:thumbsup:

 

[mcgyvr]

wrong power supply (HLG).. You want a regular constant voltage power supply.. Not constant current to feed the LDD's.

black anodizing simply increases thermal radiation..slightly.

 

[patrikk]

wrong power supply (HLG).. You want a regular constant voltage power supply.. Not constant current to feed the LDD's.

black anodizing simply increases thermal radiation..slightly.

Thanks for the input.

Does anyone have any suggestions on power supply for this set up? as I only would like to have one power supply/led fixture/unit.

I guess I would need at least 24V and ~7A I would prefere toy have a 36V and~4-5A.

 

[Skinnysloth]

Your longest string, the 10x royal blue, has a total forward voltage of ~30v, so you'll need a 36v power supply. With 1x1000H LDD and 5x700H LDD, your total amp is 4.5, so total wattage needed will be (36v x 4.5a) 162w.

So two Mean Well SE-200-36 or one Mean Well SE-350-36.

Some prefer to use neutral white vs cool white. You may even be able to drop the blue/red/green combo if you mixed in some warm white with neutral white. Remember, Cree doesn't make a deep red led (680nm), it's more like 630nm.

 

[LRStar]

led group buy dot com has a great 46v power supply. Mine is enroute so im not sure exactly how large it is... but im doing an all in one power supply kind of deal.

 

[patrikk]

I have seen them and looking at the specification they look great but visually and maybe noise wise they do not seem very appealing ( they have an internal fan). Does anyone have other suggestions or a nice looking box for those PS?
I'm trying to keep my noise levels as low as posible.

 

[patrikk]

...
Some prefer to use neutral white vs cool white. You may even be able to drop the blue/red/green combo if you mixed in some warm white with neutral white. Remember, Cree doesn't make a deep red led (680nm), it's more like 630nm.

Im just an amature but as I understand it the wavelength in the 600+ nm that is most useful is about 620nm and about 650nm ( I know that the most important spectrum is in the blue range but thats covered),

why would you go for the 680nm is it for the esthetically color balance or for the corals? and which led would you suggest that are 680nm?

 

[mpierce]

I would really look into the neutral whites instead of the cool. The neutral whites help fill in the spectrum and avoid some of that "sterile" LED look that was the major issue with the early CW/RB LED lights. Your best bet when using the neutral whites is to go 2:1 RB:NW for that 14ish K look. And of course with a dimmer make it whatever you like. So with your setup I would do 7 NW and 14 RB. And then the rest of your colors. A couple extra regular (cool) blue wouldn't hurt.

 

[patrikk]

I would really look into the neutral whites instead of the cool. The neutral whites help fill in the spectrum and avoid some of that "sterile" LED look that was the major issue with the early CW/RB LED lights. Your best bet when using the neutral whites is to go 2:1 RB:NW for that 14ish K look. And of course with a dimmer make it whatever you like. So with your setup I would do 7 NW and 14 RB. And then the rest of your colors. A couple extra regular (cool) blue wouldn't hurt.

the coloration that Im looking for is icy (whiteblueish) similar to this one here at reefcentral.

what Kelvin would you guess I would get with my setup? or with 7CW and 14RB?

 

[Skinnysloth]

Im just an amature but as I understand it the wavelength in the 600+ nm that is most useful is about 620nm and about 650nm ( I know that the most important spectrum is in the blue range but thats covered),

why would you go for the 680nm is it for the esthetically color balance or for the corals? and which led would you suggest that are 680nm?

My mistake, 660nm, not 680nm for reds. There is another absorption peak at 660nm for chlorophyll a and 630nm is for chlorophyll b. Since there are more chlorophyll a pigments than b found in algae you would want to hit that 660nm peak rather than 630nm. It may be a moot point as you plan to have only 2 total red leds which may not contribute all that much to usable photosynthetic light. If you're using the reds just for aesthetic reasons, then 630nm vs 660nm won't matter. And as I mentioned above, if you go with neutral/warm whites, you may not need the reds at all.

Edit: You could probably drop the green led as there is plenty of green in the white leds.

 

[patrikk]

My mistake, 660nm, not 680nm for reds. There is another absorption peak at 660nm for chlorophyll a and 630nm is for chlorophyll b. Since there are more chlorophyll a pigments than b found in algae you would want to hit that 660nm peak rather than 630nm. It may be a moot point as you plan to have only 2 total red leds which may not contribute all that much to usable photosynthetic light. If you're using the reds just for aesthetic reasons, then 630nm vs 660nm won't matter. And as I mentioned above, if you go with neutral/warm whites, you may not need the reds at all.

Edit: You could probably drop the green led as there is plenty of green in the white leds.

First of I appreciate all the feedback, thanks!'

I agree with you regarding the wavelengths of the chlorophyll however, I thought people used the 660nm for ATS builds (Algae turf scrubber)?shouldn't they then use the 630nm leds?

so could anyone guide me to which K ( Kelvin) the following alternative would look like:
9 CW 10 RB = looks like ?K
7 CW 14 RB = looks like ?K
7 NW 14 RB = looks like ?K
7 WW 14 RB = looks like ?K

pictures would be even better

 

[Skinnysloth]

First of I appreciate all the feedback, thanks!'

I agree with you regarding the wavelengths of the chlorophyll however, I thought people used the 660nm for ATS builds (Algae turf scrubber)?shouldn't they then use the 630nm leds?

so could anyone guide me to which K ( Kelvin) the following alternative would look like:
9 CW 10 RB = looks like ?K
7 CW 14 RB = looks like ?K
7 NW 14 RB = looks like ?K
7 WW 14 RB = looks like ?K

pictures would be even better

630nm can and is used in ATS builds, it's just that since there's more chlorophyll a in algae, the 660nm reds would be more efficient for growth.

Not sure how this translate to K ratings, but here are your spectrum graphs for your proposed leds:

* LED List
Cree XLamp XP-G 1W CoolWhite 5000-10000K XPGWHT 139lm ×9
Cree XLamp XP-E 1W RoyalBlue 450-465nm XPEROY 500mW ×10
----------------------------------------
* Total Flux
Luminous Flux : 1474 lm
Radiant Flux : 8.78 W
PPFD (PAR) : 36.15 µmol s⁻¹
----------------------------------------
* Spec by 120ﾟ & 30cm
Illuminance : 1738 lx
PPFD (PAR) : 42.62 µmol m⁻² s⁻¹

* LED List
Cree XLamp XP-G 1W CoolWhite 5000-10000K XPGWHT 139lm ×7
Cree XLamp XP-E 1W RoyalBlue 450-465nm XPEROY 500mW ×14
----------------------------------------
* Total Flux
Luminous Flux : 1285 lm
Radiant Flux : 9.94 W
PPFD (PAR) : 40 µmol s⁻¹
----------------------------------------
* Spec by 120ﾟ & 30cm
Illuminance : 1515 lx
PPFD (PAR) : 47.16 µmol m⁻² s⁻¹

* LED List
Cree XLamp XP-G 1W NeutralWhite 3700-5000K XPGWHT 122lm ×7
Cree XLamp XP-E 1W RoyalBlue 450-465nm XPEROY 500mW ×14
----------------------------------------
* Total Flux
Luminous Flux : 1166 lm
Radiant Flux : 9.59 W
PPFD (PAR) : 39.02 µmol s⁻¹
----------------------------------------
* Spec by 120ﾟ & 30cm
Illuminance : 1375 lx
PPFD (PAR) : 46.01 µmol m⁻² s⁻¹

* LED List
Cree XLamp XP-G 1W WarmWhite 2600-3700K XPGWHT 107lm ×7
Cree XLamp XP-E 1W RoyalBlue 450-465nm XPEROY 500mW ×14
----------------------------------------
* Total Flux
Luminous Flux : 1061 lm
Radiant Flux : 9.37 W
PPFD (PAR) : 38.31 µmol s⁻¹
----------------------------------------
* Spec by 120ﾟ & 30cm
Illuminance : 1251 lx
PPFD (PAR) : 45.17 µmol m⁻² s⁻¹


You can mess around with more color combos and the resultant spectra here:http://www.1023world.net/diy/spectra/

 

[patrikk]

...
Not sure how this translate to K ratings, but here are your spectrum graphs for your proposed leds:

...

You can mess around with more color combos and the resultant spectra here:http://www.1023world.net/diy/spectra/

neither do I but I LOVE the link you posted thanks!:beer: