Yes, constant light for longer periods can somewhat make up for low intensity. That still probably puts this near the low end of what would be recommended. Purple coloring would indicate you are getting close, but I don't see a significant amount of that in your photos. I don't think you are close to sunburn level.
Root zone temp should be fine, but I'm concerned about the leaf temperature near the light. Unless you have very good air movement it can be much warmer. The leaves don't look badly dehydrated, but perhaps a bit less plump than I would expect.
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