Is it ok to look at the light when it is on? June 07, 2023 13:58 Updated Yes, it is safe to look at the light. Related articles Can I swallow my saliva during treatment? Will the treatment cause tooth sensitivity? Can I use this if I'm pregnant or breastfeeding? How do I clean the pen and device? Where do I store the device and pen? Comments 0 comments Article is closed for comments.