Annual herb planting indoors, LED lamps with LED lights fill, what color? How many watts does a square plant fit?
Photosynthetic pigments are carotenoid and chlorophyll higher plants absorb blue violet more than absorb red light, so better with blue and purple.
The absorption spectrum of chlorophyll in the blue violet region is much wider than that in the red light region, and the absorption peak is much higher. Carotenoids absorb only blue violet without absorbing red light.
A square metre of about 15 watts, there are monopoly online, you can adjust the proportion of red and blue as required, according to the number of square meters to choose a different power.
