The short answer is yes; they can be. There are a lot of great Chinese manufacturers out there who make high-quality products.
However, there are also a lot of subpar products on the market. So it's important to research and make sure you're buying from a reputable source.
In general, Chinese grow lights tend to be more affordable than their counterparts from other countries. That makes them the best option if you're on a budget.
Make sure you have gone through the LED grow light review and do your research before purchasing. That way, you can be sure you're getting a good product that will actually help your plants grow.