If you are asking yourself, if Red or Blue light is best for your skin. It depends on what your skin is doing at the present, or what your skin needs. Your skin will need Blue light, if it is oily, acneic, or breakout prone. The blue light is the only light that brings in oxygen to destroy bacteria, and take away inflammation. Red light or LED is amazing for restoring the skins collagen and tighten the skin. If your skin , has Rosacea, redness prone, the LED Red light is excellent for diffusing redness and a quick fix for Rosacea and balancing redness!