Thinking about a red light mask? Before you compare the number of LEDs, find three things: the skin concern it is intended for, the exact instructions and whether you can follow that routine consistently. Red light therapy uses red or near infrared light. Different devices deliver different exposures. Copying the session length from someone else’s panel does not mean your mask will deliver the same treatment. Read the directions for clean skin, treatment time, frequency and eye protection. Keep the device’s own instructions together with your skincare plan, especially if you use products or medicines that increase light sensitivity. For some skin concerns, red light can be one part of a wider routine. It is not a substitute for sun protection. Decide what you want to assess, such as the appearance of fine lines, before judging the result. Take comparison photos with the same lighting, angle and expression. A brighter lamp or a smoothing filter can change the picture more than the skin. Record the device and the sessions alongside your photos. The article below gives you a device checklist and a simple tracking plan. Use the manufacturer’s settings, protect your eyes as directed, and make the purchase decision around a routine you can actually keep.