Full-face snorkel masks have been a subject of debate amongst the scientific community. The mask was ruled partially responsible for the death of a British woman in Egypt, a coroner said.

Full-face snorkeling masks can indeed be dangerous, and that is due to the increased risk of hypercapnia (elevated CO2 levels) and hypoxia (low oxygen levels) during use, according to a recent study.

Setting up the CurrentBody LED face mask was straightforward. The instructions specified that the device should be charged for 4.5 hours (to reach a full charge) before use, which I did.

Rogers says her favorites are by Celluma and Omnilux, and she suggests choosing a full-face mask or ones with larger panels instead of handheld wands for more uniform treatment.

"You could be building up a volume of CO2 inside that mask that makes you unable to get enough oxygen. For that reason, we stopped selling full-face mask-snorkel combinations a long time ago ...