Health Spa Red Light Skin Therapy. Will it damage my acrylic nails?

Hi

My sister has booked herself and me an appointment at one of these spas that does these high-tech skin therapies. One of the services is called "red light therapy". From what I understand about it, you are supposed to stand in this thing that looks like a tanning bed except it's vertical. It has these red LED lights and you stand in it for like 15 minutes and it re-freshens your skin. Has anyone ever tried this before? Does it work? Am I supposed to be naked or can I wear a bra and panties? My sister and I both have acrylic nails, will it damage our fake nails?

Thanks! 10 points! :-)