Red light therapy has been around the block. In 1903 physician Niels Ryberg Finsen won the Nobel Prize in Medicine for his successful treatment of smallpox and lupus with red light. Russia uses low-level laser therapy in their standard medical care (and they have since the 1970s). The Russians also published hundreds of studies over the decades on the benefits of red therapy light. Unfortunately, very few of these studies have been translated into English.
Red light therapy has largely been ignored by the US and western Europe until recently. However, it’s been used in a clinical setting since the 1980s in Japan, China, Canada, Northern Ireland, Vietnam, Latin America, and Eastern Europe.