Table lamps are auxiliary lamps for indoor lighting. Table lamps are mostly used on writing desks, desks, and bedside tables. At present, the light sources of traditional desk lamps mainly include incandescent lamps (heat radiation light sources) and fluorescent tubes (gas discharge light sources): incandescent desk lamps generally use 40w～60w, which can ensure sufficient illumination on the working surface, while fluorescent desk lamps are mostly opaque and The reflective metal cover, painted on the surface, and radiated light can increase the illuminance of the work. The metal cover should have a certain shading angle, so that the illuminance on the work surface is relatively uniform, and the light emitted by the lamp tube can not directly irritate the eyes. However, the light source of the above table lamp also has the following shortcomings:

A. Incandescent lamps: The disadvantages are large heat generation, power consumption, low luminous efficiency and short service life.

B. Fluorescent tube: The disadvantage is that the color rendering is poor (the spectrum is intermittent), especially its stroboscopic effect, which is easy to make the human eye illusion. It is necessary to take measures to eliminate the stroboscopic effect in the design. In addition, there are Poisonous mercury vapor is not environmentally friendly.