Is Infra Red light safe to use on your scalp?
These are entirely different devices. First off, the Anodyne product is truly far-infrared, emitting at 890 nm (infrared is above ~650-700 nm). However, the hair loss product you linked is far-red/near-infrared, with laser diodes emitting at 650 nm (which is why it glows red). If you put the Anodyne product on your skull, you'd just heat up your brain, possibly burning any hair you have left. (Well, maybe not, but it sounds kind of funny.)

I would strongly suggest you don't try regrowing your hair using an instrument designed to relax your muscles. I will give you a recommendation - read the small print very carefully. The hair product is only recommended for a certain type of hair loss called Androgenetic Alopecia. Please consult with your doctor to determine if you actually have this condition, otherwise your investment of US$600-700 will be completely wasted.