Depends on surrounding environment. If you are a dark area 200 nits would even be high. If you are in a well-lit area or outside in a sunny day, 200 nits woul

Depends on surrounding environment. If you are a dark area 200 nits would even be high. If you are in a well-lit area or outside in a sunny day, 200 nits would be super dark, and by that definition if it was unhealthy, looking at almost anything in a well lit day would be unhealthy.