Quote:
Originally Posted by aruzinsky
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 |
I use software on my computer to gradually change the color temperature on my screen for this reason.
https://justgetflux.com/
I grow in the vegetative phase with 4000K lights which are pretty neutral (I also have some 2700K lights). But I make sure they're off at 7pm. And I agree with you, the problem with violet at 400nm is that's where chlorophyll absorption rates start to drop off.