12х LED assembly for reef tank v4.3R
Version 4.3R Product code: 12xV4.3R

The 12xV4.1R LED assembly is an economy light source for your reef tank. Its creation was the outcome of years of research, as outlined in our article
Light in the Reef Aquaria


Availability:  Out of Stock

This product is obsolete and will not be available any longer. The information is provided for reference purposes. Please use instead of it the new version

Differences from Rev. 12xV4.2R.
1. The Royal Blue LEDs has been replaced by the Blue with wavelenght 460-465nm.
2. The Blue LED has been replaced by Royal Blue LED with wavelength 445-450nm with an increased amount of radiation.
As a result of these changes has been increased the "bluish" of visual perseption of the light and increased a safety of the most common spectra.
3. The Turquoise LED is presented by shorter-wavelength version for better covering the lack of this part of spectra. 
4. One of the violet LEDs, specifically 400-410nm now is "N" series, i.e. the most advanced violet LED from TSLC.
5. All LEDs names have been changed according to the new notation of TSLC.
6. Reduced price due to price drop of the violet LEDs.

Color Connectors
of chain of
Max. current Max. voltage
on the chain
Wavelength /
Color temperature
LED emitter type
Violet X1 pin1 -> X2 pin6 800ma 10.8V 400-410nm
N3535U-UNL1-A1G11H400-410nm, 700mW up @ 500mA
C3535U-UNF1-A1G11H410-420nm, 700-750mW @ 500mA 2pcs
Royal blue X1 pin2 ->
X2 pin5
1000ma 3.6V 445-450nm C3535M-DNL1-A1J11H, 600-650mW @ 350mA 
Turquois X1 pin3 ->
X2 pin4
1000ma 3.5V 496-500nm Luxeon Rebel ES LXML-PE01 bin: L3R
Cool White
Neutral White
X1 pin4 ->
X2 pin3
1000ma 10.8V CCT:8300-10000K
C3535L-C0L1- A4G11H, 139-148lm @ 350mA 2pcs
C3535L-N1L1-A4G11H, 122-130lm @ 350mA
Red X1 pin5 ->
X2 pin2
700ma 2.8V 620-630nm C3535M-RNL1-E1H11N, 56.8-62lm up @ 350mA
Blue X1 pin6 -> X2 pin1 1000ma 10.8V 460-465nm C3535M-BNF1-A1J11H, 23.5-30.6 @ 350mA 3pcs
The binning info of TSLC C3535L/C3535M. 


Total power consumption, W: ​ up to 39
Board dimensions:  
             Length, mm / in   70 / 2.76
            Width, mm / in 60 / 2.36
            Height, mm / in 7.4 / 0.29
Mounting holes diameter, mm / in 3.3 / 0.13
Mounting holes spacing, mm / in 47.5 / 1.88
Weight, grams / oz 33 / 1.16
Completely solderless assembly. Matching connectors are included. YES

The LED assembly must be used with matching LED drivers. If using with ReedLedLab controller and drivers, control channels on the drivers can be configured by jumpers. Instructions.



  • Full-spectrum
  • Small dimensions (size is determined by secondary optics)
  • 12 power LEDs, Latest C35 generation by Semileds
  • 8 LED types combined in 6 independent channels, to provide unique control over spectrum
  • Sufficient radiation in true violet range, to provide for best coloration, fluorescence, and coral growth*
  • Minimized “Disco effect”, due to densely populated LEDs and the use of hybrid secondary optics with diffusers
  • A completely solderless solution simplifies the assembly
  • 100% quality control for all LEDs on the assembly



“*” no competing solutions were available on the market by December, 2015.

Make a DIY LED fixture using our LED assembly: Video Tutorial:

Note: – the tutorial was made using rev. 2.2 of the 6-channel LED assembly and a different connector. You can also watch our video tutorial on how to use the new connectors.

Using the KRP crimper tool:

Theoretical and practical aspects of LED lighting

What type of light is available to corals in nature? What type of light do corals require for growth and for best coloration? Under what spectrum will your reef tank look its best? You will find the answers to these questions in this section.

All you need for DIY

Do you want to build a DIY LED fixture that would best fit your tank’s requirements, using the state of the art technological achievements and the highest grade components? You will find the answers to these questions in this section.


Building a DIY LED fixture has never been so easy! Find the answers to many questions that hundreds of others have asked. Everything you want to know about building DIY LED fixtures is available in this section.