Is tanda safe to use while pregnant?

LED light therapy. Looked this up. Idea behind this product is that blue LED light (along with heat/vibration to "open pores") is toxic to bacteria and the red LED light is supposed to generate reactive oxygen species. According to a published study, this has the effect of removing old collagen making way for new. The science is not validated and controlled studies for safety in pregnancy not done. I suspect is safe.