@misspurple, I guess because RLT emits bright red lights that if you are sensitive to the lights might affect your eyes. Though if you use it with the distance it is required, I guess a reg sunglasses will do. Correct me if I am wrong.
Light therapy boxes should be designed to filter out harmful ultraviolet (UV) light, but some may not filter it all out. UV light can cause skin and eye damage. Look for a light therapy box that emits as little UV light as possible..
Hi, I just read that the RubyLux emits renewing, healing infrared light in the red and near infrared wavelengths associated with pain relief, increased circulation, faster recovery times, collagen production, rejuvenation and renewal and peaks at 850nm. At 4 inches distance, it emits 1,431 mW/cm2. I hope this help some questions.