Ideally for thinning hair.....I've been googling different spas etc who all state same process....ie high frequency, oil massage, mask with steam then state Ultra vilot bulb for 5-8 mins ..I thought UV light was dangerous but spas are using them it seems. I am level 2&3 beauty qualified so an familiar with high frequency.An HF scalp treatment would be very different to using a light treatment. Do you mean that they are using infra-red for warm heat (not UV)??
What effects are you looking to achieve?