Conversation

So I made a thing.

The green on this graph shows where chlorophyll b absorbs (the type mostly used by plants). You can see it catches light in two places. Near 450nm (the blue end of the spectrum) and around 650nm (in the red).

The two lines show the wavelengths emitted by LED lights. Blue is cool white and red is warm white. Both have a spike in emission around chlorophyll's blue absorption and broad emission over the red absorption.

In other words, this is why houseplants like LED lighting!