The Biomax 900 lights are amazing they have helped me and my husband both and my sister tremendously my sister had a bad knee for years she lived with the pain and the lights took the pain away I also used to have to wear a kind of a neck back brace and I don't use it anymore it's crazy but these lights absolutely work it did take a few months for my pain to go away but it's been gone ever since and so has my sisters my husband has dark spots on his face on his skin and they have gotten better it's also helped with my stamina as far as exercising I just can't say enough good things about them. My sister used the lights first and she kept telling me how much they have helped her it took me a year to finally try them myself and I am a believer now they they are amazing I would not hesitate to try these lights. I'm attaching a picture that shows how are lights are set up we have a 450 Biomax light on the top and a 900 Biomax light on the bottom for front and behind.