Blue light vs Red light. Which is better for vegetative growth??? Instinctively, the answer might seem obvious: Blue light is for vege! That basic mantra has been plastered all over the internet. But if the issue was so simple, then why is it that so many LED grow lights are sold using such a large ratio of red to blue? Why don't we see many pure blue "vege" lights?

Wouldn't nurseries that are growing seedlings want all blue LEDs? Wouldn't indoor lettuce farms prefer all blue light since they don't want their lettuce to bloom (bolt)? Are horticulture LEDs high in red light because most of the artificial lighting market is targeting weed growers who want marijuana producing massive buds?

THE EXPERIMENT:

I decided to stop making assumptions and to test this for myself! Specifically, today's experiment tests the following HYPOTHESIS: Blue light fuels vegetative growth. Thus lettuce plants grown in the absence of blue light will grow slowly and develop less plant mass than lettuce grown under blue light.

I set…

Эм. Извините, что вмешиваюсь. Но доказано, что плавно не нужно.
Могу поискать лекцию.