In the USA and around the globe, lighting is changing. Compact, fluorescent “twisty” bulbs and LED lights have arrived, courtesy of EISA (the “Energy Independence and Security Act”; which is designed to reduce energy usage by phasing in new standards for a number of products in the US, including light bulbs). For millions of Americans who suffer from migraine headaches, new light bulbs may mean new headaches.
Researchers have long known that people with migraine are more sensitive to particular types of light. Among those types of light are the “blue” wavelengths that are at the “short-wavelength” end of the visible spectrum. Incandescent lights are typically very low in blue light, having more spectral power in medium and high wavelengths (that is, toward the “red” end of the visible spectrum).
So why might people with migraine experience more discomfort with fluorescent and LED lights than with the old, trusty incandescent?
It’s because both of those non-incandescent varieties have some spectral peaks among the blue wavelengths of light (in addition to other wavelengths). So, the next time your migraine is making you feel “blue”…it might just be due to the blue wavelengths of light in your new light bulbs.
For more information about migraine and wavelengths of light, see the journal, Headache (2000), Volume 40, pp. 194-199. And for a recent comparison of the colors of light that are represented in light bulbs, see the magazine, Popular Mechanics (2011, September, pp. 96-102).
