Apparently, they give off UV light, which is a great way to get your vitamin D during the winter, and also stave off seasonal depression. Yes, the article doesn't make this connection, but given that they're talking only of a "little bit" of redness from these bulbs, it would seem that what we have here is a small, but real, way of getting the UV rays one needs in the winter.
Not a big issue for those of you in the Deep South--you know, places like Colorado Springs and Western Pennsylvania or Washington DC--but up here in Minnesota, where the entire population is said to be UV deficient in the winter, it just might be really helpful not only to one's electric bill, but also for one's general health.
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