How To Build The Perfect Spectrum Led Light.

Phishless

Lifetime Member
Lifetime Member
Jul 13, 2017
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Arnold, MD
I put them in tank canopy.
300 watts worth over my 80G frag tank.
Every heat sink has 6 - 15K whites, 6 - full spectrum, 1 - 460nm, and 1 - 520nm
Reflection on water surface
7ead6eb7269907b743363f2f69439204.jpg

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jeffkrol

New Member
Jan 11, 2018
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WI
Mouser or Digikey.
Smaller version (spectrally so close as to be possible measurement error)
Part of their sunplus series.
https://www.stevesleds.com/Luxeon-SunPlus-Cool-White_p_355.html
Be aware of the large beam angle though. Probably best to use reflectors or really close to the water surface.

One thing though LED tech is really moving fast and Bridgelux has a COB/chips that are equiv or dare I say better.

Vesta Thrive series.
Available at Mouser or Digikey.

https://bridgelux.com/products/vesta-thrive
Vesta%20Thrive_0.png

Apparently runs 2 types of blue plus phosphors in each COB.

If one wants some added spectrum one COB to look at is Lumileds "crisp white"
Lower K temp (3000-ish) but adds some violet on the COB to "whiten" things.
Some people may appreciate the violet..

https://www.lumileds.com/wp-content...-cob-with-crispwhite-technology-datasheet.pdf
cw.JPG




Pairs of "fresh fish like" and crisp white are a pretty good one two punch.

3.5:1 (on a lumen basis) Fresh fish and crisp white estimate:
* MIXING LIST
----------------------------------------
myData fresh-fish-v2.csv x1
myData luxcrispwhite1203.csv x1
----------------------------------------

* SIMULATION DATA
----------------------------------------
Luminous flux : 4,702 lm
Radiant flux : 17,534 mW
PPF : 77.7 umol/s
TCP : 5880 K
CRI : 96
λp : 453 nm
Color : #FFD5D1
----------------------------------------

* PERFORMANCE @ 45cm & 120° (compulsory)
----------------------------------------
Irradiance : 9.2 W/m²/s
Illuminance : 2,464 lx
PPFD : 40.7 umol/m²/s

cwff.JPG


One CRI basis Crisp White/Bridgelux doesn't chart as good no matter the ratio.
Doesn't make it bad, just different.
 

CrisChloe

New Member
Jul 16, 2020
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Jakarta, Indonesia
i am using this light but don't know what exactly it is...

the seller sold as HPL, not COB or Cree..
is it other kind of led or similar?

so far, i am using Rotala Butterfly Calculator and depend on Cree option...
if PAR shows 200 with 30cm from the surface with 5cm substrate it will unforgive-able for my Hairgrass... (my tanks is 50x30x30)...

so far so good and i just make the light higher than before...
i won't burn my Pinatifida more because they just planted there and fuzz algae start growing... my thought to give time for it to adapt well...
but... i don't mind make it lower again depend on the vigor of the plants later...

this is my diy Light..
IMG20201210022928.jpg


this is the tank..
IMG20201210094150.jpg

IMG20201210094147.jpg

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IMG20201210085324.jpg


IMG20201210022928.jpg


the middle line is 10.000K led... but have no idea why the color is like 6500K in the middle...
my thought is alot phospor or any that absorb pink spectrum beside.. but i am not sure...
 
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