There are four general types of light sources for writing desk lamps: incandescent lamps, halogen lamps, fluorescent lamps and LEDs. The four types of light sources have their own advantages and disadvantages. Different people may like the light color and brightness of different light sources, which should be suitable for each person. In order to be able to project most of the light onto the desk, the installation position of the light source of the writing desk lamp is usually horizontal or downward.
When choosing a writing desk lamp, in addition to checking its optical performance, you should also check whether other performance is qualified.
One pull, two tone, three shake, four touch.
"Pull": Pull the plug of the power cord away from the socket, and forcefully pull the power cord out of the lamp cavity to see if the power cord is firmly connected. The power cord cannot be detached from the lamp cavity.
"Adjustment": adjust various working positions of the desk lamp. When adjusting, no sound can be made. After adjustment, the working position should be able to be locked conveniently and reliably.
"Shake": Adjust the desk lamp to the most unfavorable working position, and then gently shake the flat surface on which the desk lamp is placed to see if the desk lamp is easy to tip over. If the desk lamp is not stable enough, it is easy to tip over.
"Touch": After lighting the table lamp for a period of time (2 hours), touch the lampshade with the hand to easily touch the heating parts during use to prevent accidental burns in the future.