Building an LED light for a 30 l aquarium

I wasn’t really happy with the light which comes with my 30 l aquarium. But I have a lot of white 3 W LED laying around. So we will build a new LED light for the aquarium.

Bill of material

Building the new LED light

First, we place the heat sinks into the clamp and fix it with the second part. So we have it easier to work with the heat sinks and the cables.

Second, we add the thermal paste to the LEDs and place them on the heat sink. Try to orient the polarity of the LED in an alternating pattern. Then we can solder the cables easily to the LEDs later.

Placing the LEDs on the heat sink
Placing the LEDs on the heat sink

If we use thermal paste instead of thermal glue, we can fix the LEDs with two drops of super glue to the heat sink.

LED glued to the heat sink
LED glued to the heat sink

Now we can solder the cables to the LEDs. We solder all 12 LEDs in series.

The last step is to place the reflectors on each LED. They should just clip on the heat sink.

Comparison of both lights

So, here is the old Dennerle Nano Cube 11 W light, which comes with the aquarium:

Old light on the cube
Old light on the cube

And here with the new light:

Cube with the new light
Cube with the new light

And here some pictures from different angles of the finished light:

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