A: White light contains all the colors of the visible spectrum similar to natural daylight. Of all the colors contributing to the benefits of the EnergyUp Natural white, it is the color of the EnergyUp Intense Blue that is most effective. Adding the EnergyUp Intense blue to the normal room illumination has effects comparable to the bright light of EnergyUp Natural white. Since all the other colors contributing to the visual brightness are not contained in the EnergyUp Intense blue, this device can be very compact and yet comfortable for use.