What kind of lamp? Detailed introduction?

1. Direct-type lamps (glazing 0 ~ 10%, dimming 90 ~ 100%) emit light directly from above the lamps, and the reflective material at the top is opaque, usually made of metal, enamel, lead and silver-plated mirror. Direct-type lamps have high efficiency, concentrated light and strong directionality, but they are easy to produce heavy shadows, and there is almost no light at the top. 2. Semi-direct lighting (glazing 10 ~ 40%, under lighting 60 ~ 90%) emits light through translucent materials, which can irradiate more light to the working face and make the space environment get proper brightness. Generally speaking, lamps and lanterns are glass-covered. 3. Diffuse lamp It is a closed lampshade made of diffuse light-transmitting materials, and the milky light bulb is one of them, with soft light but more light loss. 4. Indirect lamp The upper part of this lamp is made of transparent material, and the lower part is made of diffuse light-transmitting material. The light is emitted upward from the ceiling, which makes the ambient light even and soft, but the top of the lamp is prone to dust, which affects the luminous efficiency and causes great light loss. B. structural classification: 1. Open lamp, without transparent cover, the light source is the same as the outside. 2. Protective lamp with transparent cover (ivory glass ball lamp). 3. Closed lamp, with a transparent cover closed lamp (such as waterproof lamp). 4. Explosion-proof lamp, no explosion danger (miner's lamp). C. Usage classification: lamps with function and decoration. Table, hanging, wall, falling (four types of lights) 3. Public use 4. Decorative use. Special purpose lights (dust-proof lights, explosion-proof lights, sealed lights, black lights, laser lights, emergency lights, etc.). D. Classification of fixed methods: 1. Ceiling lamp-the lamp is fixed to the ceiling. 2. Inlaid lamps-lamps are embedded in the ceiling. 3. chandelier-the lamp is hung from the ceiling through wires or steel pipes. 4. Wall lamp-the lamp is installed on the wall and is decorative. 5. mobility 7. Track lamp-the lamp is installed in the track, and the mobility is generally shooting the lamp, which can change the angle and partially illuminate ②. Code JDD chandelier JXB wall lamp JTY street lamp JXD ceiling lamp LD floor lamp YT fluorescent lamp YB fluorescent wall lamp YD fluorescent chandelier.