COPENHAGEN — Plants need food, water, red and blue.
Red and blue light that is, according to John Erland Ostergaard, a professor at the University of Southern Denmark, who has come up with a lighting system based around LEDs that he says could drastically cut the power consumption in greenhouses. (We met at Copenmind, a technology conference taking place this week in Copenhagen. Also to note, Toyota downplays lithium-ion batteries
and an Irish scientist makes plastic with bacteria
In the system, microcontrollers adjust the amount of red and blue light, the portion of the light spectrum that plants need to grow to ensure optimal growth, coming from the LEDs. The amount of red...