Broad Band Light is a catch-all phrase for photo dynamic therapy which includes, laser, LED, IPL, and other light devices. Red Light Therapy (RLT) is one of the more popular devices, and Twickle Purple writes that she wants "to give an update to anyone thinking about RLT. Here is my face with 'rosacea; from decades of steroid use and after two years steroid free and using red light therapy. It's like my telangiectasia was dissolved away." We have also included RF Frequency units that include LED.