One of her most important contributions was the development of a white phosphorus powder coating for fluorescent tubes creating a much more daylight - like light .
Martha Thomas held over 20 patents for improving lighting technology and manufacturing , covering for example fluorescent lamps and phosphor chemistry .
One of Martha Thomas ' most important contributions was the development of a white phosphorus powder coating for fluorescent tubes creating a much more daylight - like light .
Martha Thomas held over 20 patents for improving lighting technology and manufacturing , covering for example fluorescent lamps and phosphor chemistry .