The courtyard lamp is mainly composed of five components, which are:
I.The light source
Light source is an important part of all lighting products. According to different illumination requirements, different brands and types of light source can be selected. The commonly used light source includes incandescent lamp, energy-saving lamp, fluorescent lamp, sodium lamp, metal halide lamp, ceramic metal halide lamp and new LED light source. Characteristics of each light source:
1. The incandescent light bulb
Incandescence refers to the visible photoelectric radiation produced by heated atoms. Incandescent lamp USES the principle of incandescence, which allows electric current to pass through the tungsten wire in the vacuum, and causes the tungsten wire to heat up and emit visible light after incandescence. The color temperature of an ordinary incandescent lamp is 2800K, which is warm compared with the color of natural light. Advantages and disadvantages of incandescent lamp: low cost, easy to use and install. Suitable for frequent opening, point out the effect of the lamp performance and life is very low.
Advantages and disadvantages of incandescent lamp:
Short life, low luminous efficiency. The visible light emitted by incandescent lamps generally accounts for less than 10% of electric energy, most of which is converted into infrared radiation, generating a lot of heat. In addition, the ultraviolet radiation that incandescent lamp gives out is higher also, can cause illuminate article to fade.
2. Fluorescent and energy-saving lamps
Fluorescent lamp, energy-saving lamp is a kind of low-pressure mercury vapor arc discharge lamp, usually long tube, each end has an electrode. The lamp contains low pressure mercury vapor and a small amount of inert gas. Fluorescent lamps are divided into straight fluorescent lamps and compact fluorescent lamps. According to the starting mode, straight tube fluorescent lamp can be divided into preheating start, fast start and instantaneous start, and according to the lamp tube, it can be divided into T12, T8 and T5. Compact fluorescent lamps were developed to replace incandescent lamps, which consume a lot of electricity. A typical incandescent bulb has a life span of 1,000 hours, while a typical compact fluorescent bulb has a life span of 8,000 to 10,000 hours.
Advantages and disadvantages of fluorescent lamp and energy-saving lamp:
The main advantage of fluorescent lamps is their high luminous efficiency. A typical fluorescent lamp emits about 28 percent of the electricity input in visible light. The geometry of the tube, filling gas and pressure, phosphor coating, fabrication process and ambient temperature and power frequency all affect the luminous efficiency of the fluorescent lamp. The color of the light emitted by a fluorescent lamp is largely determined by the phosphors applied to the inside surface of the tube. The color temperature of different fluorescent lamps varies widely from 2900K to 10000K. According to the color, it can be roughly divided into warm white (WW), white (W), cold white (CW) and daylight (D). In general, warm white (WW), white (W) and daylight (D) fluorescent lamps have average color rendering. Cold white (CW), soft white and advanced warm white (WWX) fluorescent lamps can provide good color rendering. Advanced cold white (CWX) fluorescent lamps can have excellent color rendering. The light that fluorescent lamp gives out is more dispersive, not easy focus, because this is used extensively more downy illume, resemble, shoot floodlight illume, working illume, downy key illume.
3. Sodium lamp
Also known as high pressure sodium lamp is a discharge lamp by sodium vapor discharge. High luminous efficiency, long life, good adaptability to the environment, all kinds of temperature conditions can work normally.
Advantages and disadvantages of sodium lamp:
Sodium lamp specification and size large; Light chromatic aberration, is an uncomfortable yellow and white cold light; The color display performance is poor, the color display index of the ordinary high pressure sodium lamp is only 23. Therefore, the ordinary high pressure sodium lamp is mostly used for road lighting and other requirements for luminous efficiency and life, while the light color and color display performance requirements are not high fields. There is also a class of improved high color display high pressure sodium lamp, with warm white light color, color index can reach more than 80% of high color display. This kind of lamp can be used in the display lighting field, energy saving effect is obvious.
II.Lamps and lanterns
More than 80% reflectors, light transmittance of more than 90% of the light shade, high IP class to prevent mosquitoes and rain penetration, but also a reasonable distribution of light shade and internal structure to prevent glare from affecting the safety of pedestrians and vehicles. Cutting wire 2, welding lamp bead 3, make lamp board 4, test lamp board 5, coating heat-conducting silicone grease 6, fix lamp board 7, welding wire 8, fix reflective cover 9, install glass cover 10, install plug 11, connect power cord 12, test, aging 13, inspection, label 14, packing and storage.
The main materials of courtyard lamp pole are: equal-diameter steel pipe, heterosexual steel pipe, equal-diameter aluminum pipe, cast aluminum lamp pole, aluminum alloy lamp pole. The diameter of the commonly used have, 60, 76, 89, Φ Φ Φ Φ 100, 114, 140, 165, Φ Φ Φ according to different height and the place, the selected material thickness is divided into: wall thickness, wall thickness, wall thickness 3.0 3.5 2.5. (above are normal sizes)
Production process: 1, blanking 2, bending 3, welding 4, repairing and polishing 5, shaping 6, cutting 7, assembling bottom plate 8, welding bottom plate 9, opening door 10, welding door 11, electrical bar 12, locking bottom 13, bending fork 14, galvanizing 15, plastic spraying 16, inspection 17, delivery.
Flange is an important component for the installation of lamp posts and ground in the courtyard. Courtyard lamp installation method: garden light before installation, need according to the manufacturer to provide standard flange size, use the M16 or M20 (commonly used specifications) screw welded into a cage, and then in the installation location, the excavation, appropriate size of the hole, the foundation cage placed among them, the level of correction after using cement concrete casting based on fixed cage, 3-7 cement concrete fully solidified in the future, can install garden light. (note: the embedded pipes need to be drawn out when the courtyard lamp foundation is poured).
Installing a courtyard lights, opened the package, check the integrity of garden light, referring to the product specifications, assembling and wiring, the general steps of: open the lamp shell, installation of the light source and form a complete set of electrical appliances (electric wiring reference manual), the lead by threading hole leads to the bottom of the light pole, and then put the lamp holder and lamp post links, pay attention to tighten the fastening screws, and then put the garden light based embedded parts screw alignment, flange and vertical stand. Tighten the mounting nut after leveling with nut or pad.
Yard lamp circuit wiring:
After the end of the installation of courtyard lights can refer to the manual and electrical specifications by wiring work, need to pay attention to is that the installation of wiring needs to be grounded, the general courtyard lights will be reserved grounding terminal, for grounding, put an end to safety risks.