The main health concern about LED household lighting is that too much blue interferes with people's circadian rhythm. Some manufacturers have addressed this by replacing some of the blue and red wavelengths with violet wavelengths near 400nm. I consider this a sales gimmick like "made with sea salt" and "gluten free." Plants prefer red (660nm) and blue (450nm) to violet (400nm) therefore the "healthy" bulbs are not so good for plants.
http://www.ledsmagazine.com/articles...-lighting.html