In the last few years, LED lighting has been developing extremely fast and has replaced traditional illuminators. Quality illuminators have many advantages such as economy and long life. At this stage, with a well- constructed illuminator with an absolutely transparent polished glass body has a light output of about 130 Lm/W. If the glass is matte or white, the illumination decreases by 20 - 50% and becomes about 100-60 Lm/W. Every barrier surrounding the diodes, including the various types of optics, lowers the overall illumination. Hence, if a diode bulb or a fluorescent tube is placed in another body, the overall illumination decreases by 15 - 50%. The most important indicator for a lighting fixture is the illumination which is measured in Lm, and not the power, which consumes and is measured in W. A higher power index of a lighting fixture does not refer to its level of illumination. It refers to the amount of electricity it consumes.
Other key indicator is the Color Rendering Index CRI. The advisable index is anything higher than 80. A lower CRI the sensation is unpleasant and the color temperature for which surpasses the advisable 4000k becomes harmful for the sight. The reliability and lifetime of a lighting fixture depend heavily on its cooling. We design LED lighting fixtures that work at 55º as, in most cases, that is temperature, because most often this is the temperature that reaches the upper part of the premises. All of our LED illuminators are produced with reinforced radiators of at least 50cm² / W, which guarantees the cooling and long life of the lighting fixture. Very often, lighting fixtures are produced with pulse power supplies, which in order to operate continuously require a surrounding temperature of up to 50°, which means that if installed in a lighting fixture requires a surrounding temperature of up to 30°-35°, otherwise their lives would rapidly decrease. It has to be noted that with illuminators of Far Eastern origin, very often the illumination level presented on the label very often differs from the actual one with up to 3 times, and the cooling radiators are from 2 - 5 times less than the required, leading to a rapid destructuring of the LED and a reduction of the luminous flux with up to four times within a year. A common approach is to replace solely the bulbs or fluorescent tubes. Although it is an easy alternative, this is usually not recommended, especially for sealed fixtures with a plastic body, because without a good cooling the life of the illuminator sharply decreases. Besides, the additional plastic lampshade also decreases the overall level of illumination.
Very often the lighting fixture is selected with the main criteria being the lowest cost for W. These are bodies with an operating mode of the components is out of the nominal values, leading to a sharp decrease of their life of 20 - 50 times. In the electro-material sector, which includes wiring devices / switches, contacts etc./, there are clearly defined rules and requirements / operating temperature, power dissipation of the fixture, overheating and others, which are unfortunately missing in the LED lighting, therefore, the whole lighting sector has become a problem including a large part of the products of industry-leading lighting companies. Our main criteria when designing and manufacturing the products are reliability and durability. All illuminators have an aluminium body with integrated diodes for better cooling and durability. The power supply is made of passive elements only, giving the illuminators a resource of more than 50,000 hours. The illuminators have a design similar to the analogues are to replace and are designed for easy installation. Our goal is to create reliable, functional, affordable and beautiful lighting fixtures.
Colour rendering index and colour temperature
The colour rendering of the lighting sources is an indicator for their ability to reproduce the colours of a given object in a realistic way. The colour rendering index is marked as CRI.
The colour temperature is indicated in units, called Кelvins (К). Low colour temperature of 2800-3000K creates warm and cosy effect. 4 000K is neutral and most universal, while high colour temperature of more than 5000- 6500K creates cold illumination effect.
Several groups are defined below in order to make the comparison of the colour rendering quality easier:
|1А||90-100||Exact coincidence colours||Galleries, medical checks, colourprocessing|
|1В||80-90||The colours can be clearly assessed||Housesq hotels, offices, schools|
|2||70-80||Average colour rendering||Industry, offices, schools|
The maximum indicator CRI=100 corresponds to the daily light. According to research, lighting fixtures with a CRI index higher than 75 can ensure a realsitic perception of the colours of the surroundings, while once with an index lower than 65 do not. When you purchase an LED product, you should choose one with a CRI index of 80 and above. The results of the research show that colour temperatute within the range of 2800-4000K is the most appropriate urban and household lighting systems. Lighting fixtures with colour temperature 5000-6000K are suitable only for illumination of signboards. If such fixtures are used in household or industrial premises they could be harmful for the eyesight. The colour rendering index and the colour temperature are one of the most important indicators for the illumination of your home, office or other premises. They are the ones that determine whether the illumination will irritate your eyes, whether the area will be well lit or even – how you will feel emotionally.