About the author:  As well as being one of the founders of, Dr. Richard Hansler PhD is a prolific author who first published Great Sleep! Reduced Cancer! in 2008 at the age of 83!  A wonderful exposé on Dr. Hansler’s life as he continues to go strong at the age of 93 can be found here. ( See 2nd half of the article.)

Great 1000px raster

Great Sleep! Reduced Cancer! – 2nd Edition: Dr. Richard Hansler Ph.D.


In stock

Great Sleep! Reduced Cancer! A Scientific Approach to Great Sleep and Reduced Risk of Cancer. By Richard L. Hansler PhD.

Dr. Hansler’s first book describes his growing concern about the damaging effects of using ordinary light at night and his struggles to find a way to make light safe. It covers the development of the technology that underlies the products sold on this website. It gives a history of their development and the scientific basis for the claims in the title of the book.

Dr. Hansler is the Director of the Lighting Innovations Institute at John Carroll University. He came to John Carroll University after a 42 year career as a senior physicist at GE Lighting.

SKU: 1215-05-000-0000 Category: Tag:

You may also like…