I always look for a company that has been around for a while and has had good success in past. I don't buy anything cheap on bidding website coming out of China.
Aquaillumination 26 hd hydra would be a good unit for your tank. Nano like urs only need 1 led.
If you want to spend a little more radion (owner of aquaillumination) has a few good units.
Wi-Fi or app connectivity, flexibility of adjustment on color and strength and added features like lunar cycle, acclamation mode, storm etc are something to look into.
For most part you need adjustable light so you can set a sweet spot strength.