A luminous alarm clock, as the name suggests, is an alarm clock that can emit light at night. Its main function is to allow people to see time at a glance when they wake up at night. The luminous principle of night light alarm clocks varies depending on different products. Night light alarm clocks can be divided into two types: light storage type night light alarm clocks and self luminous type night light alarm clocks.

1. Light storage type night light alarm clock

A light storage type night light alarm clock is like a rechargeable battery, which absorbs the excitation light energy during the day and stores it. After the light excitation stops, the stored energy is slowly released in the form of light at night, usually lasting for several hours or even more.

2. Self luminous night light alarm clock

The self luminous night light alarm clock is achieved through different night light materials. The night light alarm clock was invented for war needs, initially using laser compound night light powder; After the 1950s, the application of radium in the general industrial field was gradually restricted, so the luminous material for watches used much less radiative tritium. Modern night light alarm clocks basically use new environmentally friendly night light materials without radiation, whose basic chemical composition is inorganic aluminates, which are stable and have strong light resistance.