一家英国公司研制了一种新光源,可连续点二十年以上,而且在此期间无需维护或检查。这种光源乃是一个玻璃状空心球,由硼硅酸盐制成,并注入发光的磷,而靠微放射性氚来维持发光。放射性衰变的结果,氚就射出电子,激起磷光。虽然此灯的功率不大,但对任何气候条件都极其稳定,也不受海水和其他许多因素的影响。 A British company has developed a new light source that lasts for more than two decades and does not require maintenance or inspection during this period. The light source is a glassy hollow sphere made of borosilicate and injected with luminescent phosphorous to sustain luminescence with micro-radioactive tritium. As a result of radioactive decay, tritium emits electrons and excites phosphorescence. Although not very powerful, this lamp is exceptionally stable to any climatic conditions and is not affected by sea water and many other factors.