Popular Science, huhtikuu 1943
The reason for the great efficiency of fluorescent lamps can be readily demonstrated with some fluorescent paint and a small argon bulb. The paint can be made by mixing a paste of quinine sulphate and dilute sulphuric acid. Coat half the bulb with paint and, when it dries, turn on the current. The coated side will give out considerably more light than the uncoated side. The paint, upon being bombarded by ultraviolet rays from the plates in the bulb, gives out visible rays of great intensity. in regular commercial tubes, the fluorescent coating is on the inside of the tube, rather than the outside. This protects it, and at the same time utilizes those ultraviolet rays that cannot pass through the glass.
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