First, the classification of Alai lighting equipment
Alai lighting equipment includes many projects, lighting fixtures are mainly divided into two categories: one is daylight type (high color temperature) 5600K or more lamps, and the other type is light type (low color temperature) 3200K lamps. The classification is as follows:
1, daylight type high color temperature (5600K or more). The prominent feature of daylight-type lighting fixtures is that the high color temperature is close to daylight, and the light source uses a metal halide lamp with a color rendering index of more than 90%. Its light effect and light color are suitable for large-area real-life and exterior shooting. Variety distribution is different: (1) Traditional type: The size and weight of the lamp are slightly larger, and the appearance adopts the traditional lamp appearance produced by Alai Company for many years, so it is called the traditional type. Different from the traditional type, the light source is double-ended in the lamp, and the lamp has a large diameter. It is a transmissive optical combination. The spotlight series specifications are: 575W, 1200W, 2500W, 4000W, 6000W, 12000W, 18000W. (2) Compact Type: The luminaire is improved on the basis of the traditional type, and its volume and weight are smaller than the traditional type luminaire. The weight is particularly light, such as the 2500W traditional type lamp weight 30kg, while the compact lamp weighs only 15kg, reducing the weight by 50%. Unlike the traditional type, the light source is single-ended contact in the lamp, and the lamp diameter is also smaller than the traditional lamp. . Its spotlight series specifications are 125W, 200W, 575W, 1200W, 2500W, 4000W, 6000W. (3) Powerful lamp (Pa-light): It is a reflective type long-distance reflection hard-light lamp with long range and high luminous efficiency. The effective utilization rate is relatively good, the distance of 30m or so can still maintain effective illumination, suitable for long-distance projection, and has a strong hard light effect. The lamp is equipped with 5 kinds of effect lenses of different specifications to be replaced to achieve different light effects and is easy to use. The series specifications are: 125W (AC/DC), 200W, 575W, 1200W, 2500W, 4000W, 6000W, 12000W. Among them, 2500W and 4000W are used together with a lamp, which can be adjusted for replacement. (4) X-type ultra-wide beam floodlights: It is a newly developed lamp type, which is a daylight-type large-area diffuse lighting fixture to solve the problem of a single variety. The lamp has a large reflection angle and a wide beam, and the effective illumination area is wide and large, and is suitable for large-area astigmatism illumination. For example, a 6000W ultra-wide beam floodlight Xenon lamp can achieve an effective illumination of more than 1000 lux when the effective projection distance is 10m. Due to its large area and relatively high illumination, this lamp is suitable for wide occasions in film and television lighting. Currently available specifications: 200W, 575W, 1200W, 2500W, 4000W, 6000W.
2. Light type low color temperature (3200K). The lighting type lighting fixture (the light source uses tungsten halogen lamp), its light effect is close to the light, suitable for the needs and applications of film and television lighting for low color temperature lamps. (1) Spotlight: ARR I has been producing this type of lamp for many years and is a traditional project. In recent years, the company has developed daylight-type lamps, and at the same time, it has also improved its spotlights. Its weight, volume, shape, caliber and light effect are close to the compact fluorescent lamps, which makes the lamps more compact, light and practical. The existing specifications are: 150W, 200W, 300W, 500W, 650W, 1000W, 2000W, 5000W, 10000W, 12000W, 24000W (of which 12000W and 24000W are used together). (2) Soft light: It is a reflective and focusless lightweight lensless spotlight. Because it has no lens, it is directly projected, the light is even and soft, and it can achieve soft astigmatism, so it is also called soft light. The luminaire is easy to carry and suitable for medium to short range lighting applications. Its specifications are: 800W, 1000W, 2000W.
(3) Astigmatism lamp: It is also one of the ARRI company's standing lamp types, mainly for astigmatism lighting applications (the light source uses tubular tungsten halogen lamps). Its specifications are 800W single lamp and 2000W, 5000W combination lamp, which can be used with other lamp types as needed.
3. Accessories and accessories. Alai's overall equipment accessories are complete. While providing a large number of lighting equipment, it also provides accessories and accessories for the lighting equipment, which not only facilitates the use of the unit, but also maintains the integrity of the equipment. The main introductions are as follows: (1) A variety of electronic ballasts and magnetic ballasts; (2) A variety of lamp holders for various lamps; (3) Cables for various lighting equipment; (4) (3) visor, light blocking device, sleeve and paper-shielding clips for use with lamps; (6) Shading equipment, support frame and block for film and television lighting applications Board, light blocking yarn, etc. The lighting equipment provided by Alai Company is comprehensive. In addition to the above, there are related equipments, such as dimmers, distribution boxes, power connection equipment, etc., and also provide consumables, lighting color paper, and matching with lamps. Light source bulbs, etc.
Second, the characteristics of Alai luminaire
1. Stable and reliable. Alai's luminaires use metal halide lamps as the light source, and their luminous efficiency is high. Combined with the well-designed optical system, the utilization rate of the lamps is also high. More important is the luminaire design specification, the main geometric dimensions and the structure of the lamp comply with international standards. The lamp has a good ventilation and heat dissipation design, and has a certain strength and a standard temperature. Although the continuous ignition point is more than 24 hours, the luminaire can still maintain a good working condition without affecting the life. For example, in the hot summer shooting location, the ambient temperature is above 3 38, the surface reflection temperature is above 45, and the top temperature is maintained at 160 204 depending on the power. However, the Alai luminaire in use is quite stable and its reliability is high.
2, high light efficiency, normal color temperature. Alai luminaires use metal halide xenon lamps as light sources, which are lighter in weight and perform better. In general, Alai luminaires use OSRAM HMI gas discharge lamps with a luminous efficacy of 8 090 lm/W lumens and a color rendering index of 90 or more, which ensures a stable output of the light source. Due to the stable performance and consistent performance of the metal halide lamp, the color temperature parameter performance is normal, which can meet the requirements of color temperature for film and television shooting.
3. Structural specification standards. Alai luminaires have certain characteristics in their structure. First, the traditional type structure is reserved as the basic type, and then the new type is developed and the old type is improved. The lens type spotlight is small in appearance, compact in structure, light in weight, novel and practical, and maintains a high level of production process and materials. The compact, radial powerful spotlights (Pa-lights), X-type ultra-wide floodlights, and a large number of light-type low-color light fixtures have been developed using internationally accepted standards for convenience.
4, complete supporting. The lighting equipment produced by Alai Company is more and more widely used in film and television lighting, and the market in China is also expanding year by year. ARRI maintains its own path of development, with the entire product package being as small as a cable, an adapter, and a detailed parts catalog. In addition to the matching between the lamps, the varieties can also be matched. Moreover, the complete range of supporting products can reduce unnecessary losses and troubles, and open up a good application environment for users.
5, energy saving. Alai luminaires have a high light efficiency and a good usage rate. Compared with the same power lamps, the brightness is nearly one quarter higher. For example: 2500W Alai metal halide xenon lamp can reach the brightness of other lamps 4000W metal halide xenon lamp.
Third, the application of Alai luminaires need to pay attention to the problem
The use of Alai luminaires should first understand the performance of Alai luminaires and operate and maintain them correctly. Each operator should be carefully operated according to the regulations, and should be maintained at all times during use to keep the equipment in good working condition. Many of the failures that occur in daily work are often caused by improper operation. For this reason, correct operation is the prerequisite for the normal operation of Alai luminaires.
(1) The technical parameters of Alai luminaires are necessary guarantees for normal use. According to the requirements of the use characteristics of the metal halide lamp, it is necessary to have a normal optical parameter output while ensuring the electrical parameters. The Alai luminaire source is a metal halide xenon lamp. Also in use, the power supply system must also provide sufficient electrical parameters. Voltage regulation and frequency stabilization are very important. The change of voltage will affect the output of the current. If the frequency changes, the lamp will strobe. Only when the electrical parameters are guaranteed, can the light output be good. In use, the technical parameters of Alai luminaires should be taken seriously, otherwise it will cause great losses.
(2) The use of Ale luminaires should be the right choice of ballasts.
Generally, the commonly used magnetic ballasts are easy to cause the lamp to strobe due to the narrow operating voltage range, and the life is relatively short, and the dimming cannot be performed, and the weight is large. It can be used as usual in 48 grids (50 weeks). The high-frequency electronic ballast adopts a working mode for increasing the current frequency, and has a wide working voltage range, can save energy and prolong the life of the lamp tube, and avoid strobe of the lamp tube. Alai luminaire selection ballasts are determined according to the requirements of use. If shooting needs to be lifted, choose high-frequency electronic ballast as well, avoid stroboscopic, ballast weight is also lighter than magnetic ballast, easy to use, good for ensuring normal light output, but high cost More than one-third of the magnetic ballasts. Generally used magnetic ballasts out of range will have stroboscopic, which can meet the conventional needs; but the weight is relatively large, and the use is relatively inconvenient. Ballasts are important limiting current regulators for gas discharge lamps. Choosing properly matched ballasts is an important factor in lamp stability. Correct use of the matching ballast can ensure stable and reliable light efficiency of the lighting point of the lamp.
(3) Use Alai luminaires should pay attention to choose a good quality connector. In the work of the luminaire, it is necessary to ensure that the contact points do not have a virtual connection phenomenon, have a good insulation effect, and can resist high frequency interference, and do not affect the light-emitting point of the lamp. Poor connectors, false contacts, and virtual connections are the factors that cause the Alai lamps to flicker.
(4) The configuration of the Alai luminaire power supply system should be properly used. Be sure to achieve the best possible electrical balance. There is a stable voltage state between the phases and between the wires to ensure that the lamp has a reliable electrical parameter input, and the lamp has a steady state at the ignition point. The power system configuration is unreasonable. If it is used improperly, it will cause an imbalance of electricity and cause voltage and current changes. The lamp will be extinguished or unstable due to the out-of-phase type being out of the allowable range. The choice of cable should also focus on quality, it is best to use a dedicated cable. Because the gas discharge lamp is used as the light source, the high frequency generated must have good shielding and anti-interference performance, so as to avoid mutual interference between the lines, which causes trouble in use.
Alai lamps are widely used in China. When we introduce foreign lighting products, we must also sum up our experience and develop our own products. Through the use, we feel that the Alai luminaire still has the following shortcomings: (a) Partial maintenance of electronic products is difficult, and the information and means are insufficient. Component replacement is not very smooth and has an impact on normal use. (b) Alai luminaires are not sufficiently advertised in use. Most operators do not understand the performance and operating procedures of the luminaires, sometimes causing trouble and loss. (c) Alai luminaires are not ideally suited to different types of light sources of the same specification. (d) After-sales service is still not satisfactory.
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