Purple LED bulbs sold as "growing light" everywhere. It is just a LED bulb made from blue and red LEDs. Green plants absorb blue and red and reflect green, so green light is not used by plants. So, theoretically you could provide more light useful for plants with less power if lamp will convert consumed electricity into blue and red only. Really, not as affective as advertised.
Purple LED bulbs sold as "growing light" everywhere. It is just a LED bulb made from blue and red LEDs. Green plants absorb blue and red and reflect green, so green light is not used by plants. So, theoretically you could provide more light useful for plants with less power if lamp will convert consumed electricity into blue and red only. Really, not as affective as advertised.