I did a similar build for my nano reef and thought I would share

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Supplies:
4 Colors 3 LED 5050 SMD Car DIY Flexible 12V Strip Light Waterproof in Blue - Ebay - $3
5.5mm 2.1mm Female Power DC Extension Cable Jack - $.46 - Ebay
Adapter Converter AC 100-240V DC 12V Power Supply US - $2.37 - Ebay
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Overall this only took about an hour to do the soldering and fit everything into the hood.
The LED strips
They already have an adhesive strip on the back
Wired them to the old 2-pin fan adapters
I mounted one strip with my angle adjustable moonlight from my custom LED build.
Originally I had this one on the fan, but I later moved it down to the heatsink.
The female DC jack.
I re-purposed the original power connector from the old PC lighting system to power the PCB board.
Here is what it looked like first testing it.
Installed with the hood lifted.
FTS
Colors popping.
Here is a link to my BC14 LED retrofit if anybody is interested in that too.
BJBass Aquastyle LED BC14 Retrofit
Let me know if you have any questions! I will be more than happy to help.