How to choose a projector for the street?

Not so long ago the spotlight for outdoor lighting used only for industrial or institutional facilities. But with the development of electronics and technology improvements powerful lighting devices have been used and household consumers. Due to the large variety of types of lighting devices and their characteristics, ignorant townsfolk wonder how to choose a spotlight for the street. It should be noted that the choice of parameters should be considered complex, which we consider below.

Operating conditions and purpose

The first thing that you should use when choosing a projector, it is his mission and the conditions under which it will operate. In total there are three main categories of lamps:

• lighting - used for area lighting to provide sufficient visibility of surrounding area or the place of construction works.

  

• architectural - are used for lighting of buildings, architectural sites, or any other facades, fences, etc.

  

• decorative - designed to create a decorative lighting that performs the function of differentiation of areas, colored lighting area can be used for them. Such devices are characterized by bright illumination, but allow to regulate the emission color using the RGB floodlight.

  

Selection of the method of installation

Depending on the mode of arrangement of isolated spotlights with floor installation, a wall, mast or under the console. Mobility models emit a fixed installation and portable.

Architectural or stationary

Have a rigid fixation on a monolithic design, the advantage of such projectors is a reliable and accurate determination of the place lighting. Suitable for situations where lighting is previously known zone, thanks to the consolidation they do not budge the wind or careless actions person. Most often they are installed on a wall, freestanding support structure or console. They are used for street lighting entrance, gate, lawns and gardens.

Mobile

Mobile projectors can be transported from one place to another, they are easy to move and install due to special stand or pin. These devices are most useful for construction work where space lighting or protected area moves in a single object, and when changing objects.

Choice of lamp type

One of the most important indicators for the spotlight is a type of lamp installed in it. It should be noted that the incandescent lamps today are rarely used to illuminate the object, as they have a very low efficiency. Despite the wide range of lighting products, in practice often uses four, then we consider in more detail the characteristics of each of them.

LED

LED floodlights are the most modern and long-displace other types.

Diode spotlight to generate light using led lights, which provides a number of advantages:

• have a sufficiently long service life - about 50 000 hours;
• very high efficiency of approximately 90% and good light output in the range of from 90 to 120Lm / W;
• led flood light bulb is not afraid of depressurization and can work even with a damaged lens or body;
• can produce different heat emission in the range from 1500 to 8000K;
• led lamps considered most economical recalculated expended energy to the light flux produced.

halogen

Generation of light of halogen lamps takes place by heating the filament in a sealed flask filled with inert gases. The advantage of halogen spotlights is a good indicator of light transmission and low cost. The disadvantages of halogen lamps include the short duration of the - 1000 to 4000 hours. Light output from the halogen lamps is about 10 - 18 lm / W, so they can not be called economical.

This is one type of discharge lamp in which the bulb is filled with a gas mixture with the inclusion of metal vapors for better separation of light. The mixture gas is under high pressure, so the installation of these projectors should provide appropriate safety measures. light transmission for metal halide Lampsin 80 - 90 lm / W and average lifetime is 8000 hours.

sodium

sodium lamps also a high-pressure gas discharge devices in which the luminescence arises during the ionization of sodium vapor. Street lights based on sodium lamps are characterized by not less than the LED lamp light transmission - about 90 - 110Lm / W. The service life of the sodium projectors up to 30 000 hours, but among the disadvantages of isolated poor color reproduction.

Please note that technical data

Next, pay attention to the technical parameters of the lamp, and relate them to your needs and objectives. Based on this, choose the most suitable device.

Power

Parameter searchlight power indicates how much power it consumes from the external network. But consumed electricity supply for the spotlight determines the brightness for each type of lamps in different ways. For example, the LED spotlight 30 W can be correlated with productivity by halogen 300W or more.

Earlier we looked at the effectiveness of all kinds of lamps for projectors, based on this, and you select the correct power. But in addition to the generated flow should take into account the illumination area and the distance from the projector to the space. EXAMPLE height to power ratio and the luminous flux for LED models shown in the table below.

Table: power ratio, brightness and distance to the LED floodlight

Power searchlight, W	Produced Luminous flux	The height of the m
10	900	2,5
20	1500	3
30	2500	4
50	4500	6
100	9000	14
120	10800	15,5
150	13500	18

The degree of protection IP

It determines the level of protection against ingress of solid spotlight contaminants and moisture. Labeled IP this parameter Latin letters with two digits after them, the first of which indicates protection from particles and the second for resistance to moisture.

Now consider both options in more detail, starting with the first digit, which is measured in the range from 0 to 6:

• 0 - indicates that spotlight not protected from solid particles;
• 1 - a spotlight protected from objects with dimensions of not less than 50 mm (to avoid touching hands, exposure tool, etc.);
• 2 - prevents penetration of solid elements of 12mm or more;
• 3 - protects against any particles larger than 2.5 mm pieces;
• 4 - the device with such protection is not afraid of particle penetration of 1mm or more;
• 5 - completely protected against external objects, in part prevents dust, and dust particles can penetrate no effect on the performance;
• 6 - Full Dust, particulate spotlight is impregnable.

The second protection IP number is interpreted as follows:

• 0 - as in the previous embodiment denotes that the floodlight has no protection against moisture;
• 1 - lamp is protected only by dripping in a vertical plane;
• 2 - searchlight protected from droplets, pouring at an angle of 15 ° to the vertical plane;
• 3 - is protected from the impact of droplets moving at an angle of 60 ° to the vertical plane;
• 4 - is excluded penetration drops moving in any direction at any angle;
• 5 - spotlight not afraid of water jets entering from any direction;
• 6 - prevents penetration when exposed to powerful flow from any direction;
• 7 - protects against water even at partial immersion for a short period of time;
• 8 - Spotlight is fully protected even when fully submerged.

As you can see, the most the best option is the model with the level of protection from IP65 to IP68. But it is not critical, if the lamp is situated under the peak or other permanent structure, you can choose the option from another level of protection. This parameter appears in sheet or on the chassis.

Operating temperature range

Depending on the type of lamp, lens and housing materials illuminator normal operation can be realized only in a certain temperature range. Since when exposed to high or low temperatures may not light paw, structural elements may be cracked by cold or heat from the melt. Therefore, you should check the annual average temperature in your area in the coldest and most hot period, considered the most relevant LED floodlight with a range of temperatures from - 60 to + 50 ° C. But you can come up other options, depending on local conditions.

Light flow

Depending on the type of illumination separated general lighting projectors, directional (with a powerful light beam) the scattered and decorative. In addition to this Guide, a light output produces a specific model. This parameter is measured in lumens, and is displayed in the device data sheet. It should be noted that some models of lamps, over time, lose their brightness, especially those suffering LED models, so the choice is to make a small margin.

Colour temperature

Despite the fact that all the spotlights are shining white, in his shades there is a huge difference. Depending, of the emitted radiation spectrum of the light source will depend on the color reproduction of any image. So, for example, at the lighting of 3000K in all things around will be perceived in a reddish color, and at a temperature of 7000K, the perception will be in a more bluish color. glow temperature determines the color reproduction from surrounding objects, so this option must be selected in accordance with the tasks for which you acquire this searchlight.

Life time

Depending on the tasks you searchlight can be used to illuminate the suburban area, but can only be used as a lighting device seasonal working platform. Each of the options life of the device may be significantly different. Thus, in a first embodiment, the longer it lasts, the better, but the seasonal lights should work out just as much as you need to make a particular type of activity. For home use is better to take the spotlight with a lifetime of at least 12 - 15 years and to increase this parameter, you can connect it via a light sensor.

Final advice (8 tips)

Summing up the results of how to choose a spotlight for the street, should be made such recommendations:

1. despite the wide range of various lamps, the most simple and easy to use are LED spotlights;
2. choosing LED spotlight, better to take a model with a high-power LEDs, LED matrix than a dial;
3. Taking the form of the ceiling, based on your objectives - round spotlights are suitable for short distances, Square set for further exposure, spherical lighting surrounding area under him;
4. maximum energy savings can be achieved by means photo- and motion sensorThe first will only contain light in the dark, and the second only in the presence of motion;
5. choosing the material of the body, stop its attention on the metal models, they are much stronger than the plastic light and not be afraid of mechanical influences;
6. If in your area the case of frequent power outages, it is better to establish a model equipped with batteries;
7. if the supply of electric power to the site is absent or pull line to the spotlight is not profitable, it is possible to use a variant with a solar battery;
8. choosing the luminous flux, keep in mind that many manufacturers deliberately inflate the figure to increase sales, so it is best to check the work of a particular model before purchasing.