Far Infrared Light Therapy was shown in a study to be helpful for poor circulation to the hands and feet.
In the study the subjects were diabetics suffering from Peripheral Arterial Disease and the poor blood supply to the extremities.
To view the study see the link below, the study is the last but one on the page:
In this case the circulation to the limbs was so poor that they had become ulcerated and ultimately surgery was going to be required.
After the application of the Far Infrared light Therapy, circulation was restored and surgery was avoided.