LEDS, aliexpress.com (or similar goggle LG LEDS aliexpress). I use them with huge success and many people who have seen mine have bought their own units.
Cheap to buy, good results, cheap maintenance, compact units, cheap power... you will need to install a resistor inline to slow fans and make them quieter.
Other options are Maxspect razors, and Ecotech radions but cost more.
Also reef octopus are not bad skimmers. I'd put my Super Reef Octopus 5000s against the same rated skimmer of any brand for a performance comparison... Bubble Magus are good skimmers too. But its not rocket science putting an impeller and pump together to smash tiny bubbles. But some are definitely better than others by design.