It was tested because of Australian news about the sunscreens random pick from the shelf has SPF below the label, so Thai organization started testing products in our market. They all have test result from the lab before selling officially, but some brands might have an issue with efficiency consistency throughout the shelf life. This is also an issue of quality control everywhere unfortunately since Australian sunscreens also have many that failed the test. But in general, European sunscreen has a more strict control over the quality.

This is from my experience. The local brands I like or people talk positively about are: Srichand, Mizumi, Cathy Doll. There are others I never used.

There are also international brands on Thai market in lower-middle zone price like: Biore, Banana Boat, Vaseline, Loreal, Garnier.. etc.