Both.. Plants underutilize green and LED green diodes have poor conversion efficiency.. say 23% of electricity is converted to light w/ a green diode vs 45% electricity is converted to light in a blue diode.is a waste because the plant doesn't use the light
so why to waste power/space on the lamp fixure
http://www.ledsmagazine.com/article...oject-increases-efficiency-in-green-leds.htmlThe green gap has been challenging in a number of solid-state lighting (SSL) applications. For example, RGB (red, green, blue)-based approaches to delivering white light require more green LEDs than blue or red LEDs. Moreover, monochromatic applications such as green lighting in traffic signals require driving the green LEDs at higher current levels, or using more LEDs, relative to yellow or red signal lights. The green gap has also been an obstacle in LED displays or projectors and in backlight systems.