Use of the word "invention" is usually a red flag. I've certainly done a number of things I never had knowledge of any prior art on, but I never said I "invente

Use of the word "invention" is usually a red flag. I've certainly done a number of things I never had knowledge of any prior art on, but I never said I "invented" those things. If I wanted to, I'd probably go and research prior art first before making use of the word. Also, I'd say that the article author is not referring just to brighter light as the invention, but rather as the use of extremely bright light indoors for different psychological effects.