This is generally true, but be very careful with very cheap power supplies, think to the news stories of people shocked or electrocuted by cheap gas station iPhone chargers. If a power supply is cheap, you are generally compromising a great deal on safety and longevity, the extra cost is in heat sinks and a sufficient barrier between the high voltage side and low voltage side as well as fuses and thermal and ohmic overload shut offs, some of the cheapest units rely on fans and vents which are completely unsuitable around an aquarium. While we don't make power supplies, we do put a lot of time into testing the models we choose for the operating temperature and safety features and making sure the models we choose are safe and meet all Western safety standards. Meanwell is a good brand, but I wouldn't trust something that is suspiciously cheap.