In order to provide our customers with the best possible support we’ve prepared a set of answers to the most frequently asked questions (FAQ). We hope that they will help you to learn about our philosophy and to clarify any concerns regarding placing orders, on-line shopping and the LED lighting technology. For a more convenient access to the most interesting issues we’ve grouped them into categories.
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NIVISS is a modern and highly specialized engineering and manufacturing company providing comprehensive LED solutions starting from the design process to the ready-to-use products. The company excels especially in the design and production of CREE LEDs based modules, as well as in delivering finished lighting products.
Our own and modern headquarters with an area of 3500m2 is located in Gdynia (Poland). NIVISS derives from one of the biggest electronic components whole-salers – company Maritex, which was established in 1987.
NIVISS is proud to have the CREE LED SOLUTION PROVIDER status, which means that our company is an authorised provider of LED solutions recommended by the World leader in LED technology – the American company CREE.
NIVISS boasts about many prestigious projects all over the World. The company delivered RGB modules used for decorative illumination of the Śląsko-Dąbrowski bridge in Warsaw, designed and manufactured RGB panels used in LED screens in a modern sports arena in Doha (Qatar), provided a wide range of LED lighting products for many offices and shopping malls, as well as delivered LED modules used in emergency vehicles. NIVISS also cooperates with leading lighting manufactures and designs LED modules fitting their requirements.
NIVISS is a very flexible company being able to realize short projects, as well as big mass production orders. The company provides a large variety of modules based on CREE LEDs at very competitive prices. We will be happy to answer to your inquiries.
NIVSS is an authorised partner of CREE and participates in the CREE LED Solution Provider program, which assures our customers of the top level quality of our products.
Yes, NIVISS consults important projects with CREE representatives and there is a possibility of getting both – a price and technical support. Our company regularly invites CREE representatives to many exhibition events and can arrange a direct meeting with a customer.
In general CREE offers 2 main LED families: XLamp® High Power LEDs of a very high efficacy at very high drive currents and High-Brightness LED Lamps with lower drive currents consisting of 3 groups of products: THT LEDs (round and oval), superflux LEDs and SMD LEDs (PLCC2, PLCC4 and PLCC6 housings).
All products can be purchased in our online shop at www.shop.niviss.com, as well as from our numerous distributors. Individual price levels and special sales conditions are possible.
Yes, NIVISS specializes mainly in LED modules development, designs MCPCBs and combines them with proper LEDs, optical solutions and power supplies. The company has its own Construction Department and a laboratory.
All current prices of our products are presented on our online shop web site (customers based in Poland will find them on the website of our distributor-Maritex). Individual price negotiations and additional discounts are possible.
Yes – NIVISS has launched the nPartner loyalty program, which gives our regular customers a large variety of advantages like discounts, free shipping of ordered goods, free samples and a lot more.
Orders can be made in our online shop (where the customers can check our stock), but also by telephone, by on-line contact form or by fax.
NIVISS offers its customers following payment methods: bank transfer in advance (before goods dispatch), credit card, pay pal, COD (Cash On Delivery). For regular customers deferred payments are possible.
NIVISS ships the goods using UPS and DPD delivering to every country in Europe. On customers request other forwarding services can be used.
NIVISS strives to dispatch the goods ordered before 12.00 on the day of order (working days only). In case some of the ordered items are currently not in stock the delivery time needs to be confirmed with one of our employees from sales department. It usually takes from 10 to 30 days.
IV. LED technology
A LED (light-emitting diode) is a very efficient optoelectronic semiconductor element emitting visible radiation. Modern LEDs emit not only visible, but also invisible to human eye IR and UV radiation.
During the production process LEDs are assigned into groups also called BINs. Three basic assignment criteria are: luminous flux, forward voltage and correlated color temperature (for white LEDs) or wavelength (for color, IR and UV LEDs). Before ordering a LED we suggest our customers to take a closer look at the Binning & Labeling document, which contains all informations about the parameters of a specific BIN.
All light sources in our houses or at work must give an appropriate amount of light depending on the type of activities we perform. While working on a task that requires medium concentration the illuminance in a room should be at least 300lx. The desks and keyboards while working at a computer should be illuminated with about 500lx and while performing tasks that require high precision and concentration the luminous flux density should be about 750lx. For comparison the amount of light that is enough for relaxing and watching tv is about 20lx. Under this value the human eye is not able to recognize the features of a face.
Examples of suggested illuminance in rooms: – living room – main lighting: 100-200 lx, – surface of a table for reading and writing: 300-500 lx, – dining table: 300-500 lx, – computer stand: 500-750 lx, – kitchen: main lighting: 200-300 lx, under shelf lighting: 500 lx, – other rooms, hallways, stairs: 50-100 lx, – bathroom and toilet: 300-500 lx, – other exemplary values: facial features recognition: 20lx, sunny day: up to 10 000 lx.
Luminous flux (also called luminous power) describes radiation emitted from a light source over wavelengths visible to the human eye, i.e. from about 380nm to 780nm. The SI unit of luminous flux is the lumen (lm). One lumen is defined as the luminous power of light radiated from a light source that emits one candela of luminous intensity over a solid angle of one steradian.
The Correlated Color Temperature (CCT) of a light source is the temperature of an ideal black-body radiator that radiates light of comparable hue to that of the light source. In other words: the CCT is an objective measure of the color emitted by a light source. The CCT is conventionally expressed in Kelvin (K), a unit of measure for temperature based on the Kelvin scale.
Typically the white light color is described as:
– warm white – for CCT below 3300K,
– neutral white – for CCT between 3300K and 5000K,
– cool white – for CCT above 5000K.
The Color Rendering Index (CRI) describes how a light source makes the color of an object appear to human eyes and how well subtle variations in color shades are revealed. The CRI is expressed with values from 0 (very poor color rendering ability) to 100 (perfect color rendering ability), which is the index of a standard incandescent lamp. In rooms destined for works for which the perceiving of colors is not the most vital condition (e.x. woodworking) the CRI should be at least 60. For more complex tasks the recommended value of CRI is 80.
Sample picture – product is consistent with the description, may be different then shown in the picture (shape, colour, basic features)