What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?
a. green light
b. UV light
c. full-spectrum white light
d. a mixture of blue and red light
Answer: D
What wavelengths of light should be used to maximize plant growth with a minimum of energy expenditure?
a. green light
b. UV light
c. full-spectrum white light
d. a mixture of blue and red light