Who is at risk of harmful light? Gardeners, farmers, Open pit miners, outdoor maintenance workers, police officers, road workers, sport professioners, surveyors, sailors, Ranchers, Agriculture workers, construction workers, fishermen horticultural workers, lifeguards, military personnel. How about indoor workers...yes any harmful light source exposure can cause UV radiation induced problem ( include skin cancer and eye sickness): Welders, pipeline workers, pipe cutters, plasma torch operators, Germicidal Ultraviolet light exposure include Restaurant, physicians, doctors, nurses, Barbers, printers including photocopy machine workers. All harmful light source casue skin cancer and eye damage