What does a lamp’s chromatic yield express?

It express the attitude of a light source to yield real colors of an illuminated object.

The chromatic yield index (Ra) was introduced to obtain an objective evaluation of light source chromatic yiel.

For example. Halo bulbs, have a chromatic yield very close to 100.

In some products od the catalogue the word relamping is mentioned. What does it mean?

The word relamping indicates the possibility to install LED bulbs of the same standard size and with the same connection the article had before LED arrival.

Is it possible to order a Blade or Stripe LED system with custom-made sizes or corners? Is there any length limit?

Blade system has no length limit. For transport constrains we can ship single modules up to 3 meters long, however using junction it is possible to create continuous lines without interruptions, and with corner-junction it is possible to create lines with corners on the same plane (ex. wall/wall) or in different planes (ex. wall/ceiling).
Stripe system doesn’t have any length limit. For transport constrains we can ship single modules up to 3 meters long, however using junction it is possible to create continuous lines without interruptions. It is possible to create 90° corners both on the same plane (ex. wall / wall) or on different planes (ex. wall / ceiling ) , with profile and diffuser with cuts at corner. However these details must be manager project by project.

Is it true that halogen lamps only produce warm light, whereas the new energy-saving fluorescent lamps and LED lights only produce cold light?

Incandescent light sources create light with greater emission in the red and yellow field, therefore a warm white light is perceived. Fluorescent and LED sources create light due to the conversion of blue and ultraviolet radiation. The first fluorescent lamps had a greater emission in the blue and green field, therefore a cold white light was perceived. Today, lamps are available in shades of white as required.

The UNI EN 12464 standard establishes 3 different classes:
warm white: < 3300K
neutral white: from 3300 to 5300K
cold white: > 5300K

How does dynamic light work?

Dynamic light is obtained by mixing luminous flux from two different light sources with different color temperatures, using a special dimming technology. Dynamic light is a light source able to change in an harmonious way color temperature and brightness. It creates a natural light which reproduces mutations during the day or seasons or adjusts to specific needs. Studying a particular solution for each case, it is possible to obtain several benefits like: wellness feelings or concentration and performance improvement.

Is it true that a correct lighting increases productivity?

Light is universally considered  as one of the main factors influencing our life. In fact it contributes to peoples’ psycho-physic wellbeing. Operating in a place which is correctly lightened facilitates working activity, increases concentration, optimize performances, reduce tiredness, speed up activities carrying out. For this reason it is very important to use right lamps, spots, projectors or suspensions in an office, to create as much as possible the natural light effect, reaching visual comfort through the correct proportion of light and shadow. Moreover a dynamic  illumination, beside being decorative for interiors, brings benefits of a programmable light. Harmonious variations of brightness and color temperature creates a natural lighting rhythm, adjustable to desired solution. It can be adjusted to specific needs from different persons or moods, to particular activities or to create a particular atmosphere.

How should lights be positioned in a space?

A lighting designer can use different approaches to develop a technical lighting project. Here, we describe some of the basic steps taken by L-TECH in designing lighting for any type of setting (offices, hotels, residential interiors, stores, etc.):

• First of all, the customer’s needs are taken into account to assess the light effects required.
• Where certain reference standards apply in settings, these must be understood and complied with.
• Various visual tasks to be performed in the setting are taken into account. Lighting scenarios are hypothesized in real conditions of use and the required lighting compositions are determined for the surfaces involved.
• The project is completed with a choice of lighting fixtures that meet the criteria of the above points, which are then positioned in the setting.
• The results are checked in the various scenarios.

Which lighting systems are the most suitable for sales areas?

Sales areas usually require good lighting to emphasise the merchandise on display. To achieve this the ratio of luminance between the object and the background should not be overlooked, which means that the object should be primarily illuminated with a beam of light directed in relation to the setting. In fact, if the background is equally lit, the eye will adapt to the average luminance, and the object will appear less illuminated.

As a consequence, lamps are used which have a narrow beam of light and high luminous intensity (on axis). Care must be taken when positioning a lamp so that no part of its beam dazzles. This is why discharge light sources are employed, which, as they are point-like sources, allow excellent control of the beam of light. Light points must be included that switch on again immediately in the event of a power failure (fluorescence), as well as light points with high colour rendering if colour is an important feature for the illuminated object. In this case, a halogen light source is preferable for excellent red colours. For example, Diapson recessed lamps can be used with various electrical connection options.

Which lamps create more light and use less energy?

Each lamp has its own characteristics that include a more or less intense luminous flux, the direction of light distribution in space, the colour quality of light, and energy consumption. There is no ideal lamp, but rather a lamp should be considered in relation to the lighting composition and the desired visual effect. It is the lighting designer’s task to develop a technical lighting project in order to create the right light scenarios for various settings.

Some general indications can usually be given. Fluorescent lamps have good luminous efficiency (T5 HE up to 104 lm/W) and adequate flows for general lighting both indoors and outdoors. LEDs have high luminous efficiency and are very versatile. They are ideal for localised lighting (step lights, store window displays, display stands), for colour control (colour therapy and entertainment), and for functions that reduce high maintenance costs. Halogen lamps have low luminous efficiency but unparalleled colour quality. They are ideal for completing prestigious lighting scenarios. Discharge lamps have high luminous efficiency and high flows, and are ideal for lighting outdoors or large indoor spaces.

What are the advantages of LEDs?