Of course we can use only red and blue bruple light configuration, or any customized spectrum on our light, that's easy. But as for the yields, did HydroGrow really say that? out perform by 45% easily? that seems like a joke...We can do different spectrum, different led brand, different led array, different configuration, but we won't say that, burple light is also good, but not so effective as before, especially comparing to high output white leds whose spectrum is constant with full spectrum. Also the PPF of burple light is not outstanding, not even to say double yields, there is no secret on led grow lighting market, people can find drivers, top brand diodes with top bins, any configuration on market, many growers are even more professional than factories, so it's not good to use exaggerate marketing, people are not fool...