What is the science behind purple grow lights?

Are there reasons behind them? Or is it just a way to lure people into buying useless stuff?

Red and blue light have been proven to be two of the most important wavelengths for photosynthesis.

Red light promotes fruiting and flowering while blue light contributes to robust stem and root.

However, other light colors are also important for plant health, and this is becoming more and more clear as scientists and researchers understand more about how plants respond to other light colors. That’s why full-spectrum lights come in place.

MORE: Red and Blue Light: The Ultimate Guide

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