The Luma has been amazing for our almost 11 year old German Shepherd, Odin. His arthritis pain in his hip and back is manageable now and under control, he is back to walking 1-2 miles a day and playing with his brothers. On recommendation from Christine, our therapy assistant from Luma, we also used the light for a laceration that Odin had on 1 of his paw pads and it healed in less than a week! The company is prompt and easy to get a hold of and they also make it easy to pay for the device as well as to troubleshoot any difficulties. We are extremely happy that we purchased the Luma for Odin, it has been a game changer in his arthritis treatment.