Why Doctors Wear Sunblock Indoors

Text
A physician has sparked discussion by explaining why they apply sunscreen indoors, citing concerns about ultraviolet radiation from artificial light sources. The Washington Post column, authored by a medical professional, highlights growing awareness of potential health risks associated with prolonged exposure to indoor lighting, particularly LED and fluorescent technologies.

Subheading
UV-A radiation from indoor lights raises health concerns
According to the column, the doctor wears sunblock daily despite being indoors, emphasizing that certain types of artificial light emit ultraviolet A (UV-A) radiation. "While the sun is the primary source of UV exposure, I’ve learned that LEDs and fluorescent bulbs can also emit low levels of UV-A," the author wrote. This claim aligns with research from the National Institute of Occupational Safety and Health (NIOSH), which notes that some commercial lighting systems produce measurable UV-A emissions.

Text
The physician’s rationale stems from a 2023 study published in the Journal of Investigative Dermatology, which found that extended exposure to UV-A radiation—even at low intensities—can contribute to skin damage over time. "The cumulative effect of indoor UV exposure is an area that requires more attention," said Dr. Emily Zhang, a dermatologist at the University of California, San Francisco, who was not involved in the original column. "While the risk is lower than sun exposure, it’s not negligible, especially for those working in environments with high-intensity lighting."

Subheading
Technology behind UV-emitting lighting
LED and fluorescent lights generate visible light through different mechanisms. LEDs use semiconductor materials to produce light, while fluorescent lamps rely on gas discharge. Both systems can inadvertently emit UV-A radiation as a byproduct. A 2022 report by the Lighting Research Center at Rensselaer Polytechnic Institute found that certain LED bulbs, particularly those with phosphor coatings, can emit UV-A levels exceeding safety thresholds set by the International Commission on Non-Ionizing Radiation Protection (ICNIRP).

Text
The Washington Post columnist noted that their office lighting and computer screens contribute to daily UV-A exposure. "I’ve started using sunblock as a precaution, especially during long workdays," they wrote. This practice has drawn mixed reactions from readers, with some questioning the necessity of such measures. However, experts caution that while the risk is minimal, it is not zero.

Subheading
Industry responses and safety guidelines
In response to growing concerns, some lighting manufacturers have begun developing UV-filtering technologies. Philips, for example, introduced a line of LED bulbs with enhanced UV-blocking coatings in 2024. "We’re proactively addressing these issues to ensure our products meet the highest safety standards," a company spokesperson said.

Text
Regulatory bodies have yet to issue specific guidelines for indoor UV exposure from lighting. The U.S. Food and Drug Administration (FDA) currently focuses on UV radiation from tanning beds and solar simulators, not artificial lighting. However, the European Union’s REACH regulation includes provisions for substances that may emit UV radiation, prompting some manufacturers to adopt stricter safety protocols.

Subheading
Practical steps for reducing exposure
For individuals concerned about indoor UV exposure, experts recommend simple precautions. These include using lamps with UV-filtering glass, opting for lower-intensity lighting, and limiting prolonged exposure to bright screens. "It’s not about avoiding all artificial light, but being mindful of cumulative exposure," said Dr. Sarah Lin, a public health researcher at the Harvard T.H. Chan School of Public Health.

Text
The Washington Post columnist also emphasized the importance of regular skin checks and consulting healthcare professionals. "Prevention is key," they wrote. "Understanding the sources of UV exposure—whether from the sun or your desk lamp—can help protect your health in the long term."

Subheading
Ongoing research and future implications
While the link between indoor lighting and skin damage remains under study, the conversation has prompted renewed interest in light safety. A 2025 report by the World Health Organization (WHO) highlighted the need for further research into the health impacts of non-solar UV sources. "As lighting technology evolves, so must our understanding of its potential risks," the report stated.

Text
For now, the physician’s decision to wear sunblock indoors serves as a reminder that health considerations extend beyond traditional sun exposure. As technology continues to shape daily life, balancing innovation with safety remains a critical challenge.

Quoted text
"UV-A radiation from indoor lights is a topic that deserves more attention. While the risk is low, it’s not zero, and precautionary measures can make a difference."
SourceThe Washington Post column, "I’m a doctor. Here’s why I wear sunblock indoors."