Photodynamic 1.48 nano-scale genetic biological wave LED cold light sources 2.Red, yellow, blue, red yellow, red blue etc. With 48 nano-scale genetic biological wave LED cold light sources With red, yellow, blue, red yellow, red blue wavelength etc optional 1 min, 2mins, 3mins, 4mins,5mins or continuous wavelength can be set up as working mode With pulsed operation mode With replaceable single ...