Driving mittens with their backs chemically treated to glow in the dark have been introduced for motorists in 1941. Besides being useful for giving hand signals to following drivers, the mittens provide enough light to show up the keyhole in a car or garage door. Exposed to a strong light momentarily, they are said to show the ground for several yards around, and still give off light after two or three hours. They are available in several sizes.
Besides helping to guide the following driver, as shown, glowing gloves emit enough light to locate a keyhole in a garage door.
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