Spotlight Professional LED Teeth Whitening System. Using nanotechnology, the LED Teeth Whitening Device emits dual action blue and red wavelengths to break down stains, accelerate whitening and rejuvenate gums.. Step 1 Apply PAP Pro Strips. Longer Strip on Top Teeth, Shorter Strip on Bottom Teeth. Step 2 Activate the LED Device. Use Blue Light for 10 minutes to accelerate whitening, then use Red light for 5 minutes to rejuvenate gums.. Step 3 Apply the PAP Pro Pen. For an additional 15 minutes