Most all of the seeds have sprouted. It's interesting to note that the plants appear black under this blue light. That's because all of the blue light is being absorbed by the plant. Only green/yellow colored light would reflect off, giving the plants their green appearance, but I'm not providing any light of that color.
Just because the blue light is being absorbed doesn't necessarily mean that it is penetrating or that the plant is getting any photosynthetic benefit from the light. It's difficult to tell with seedlings because these are still operating on energy stored in the seed itself. Once more leaves appear we'll be able to make a better judgement about health and growth rates.
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