Research

Sice 2006, we record and process experience of our customers and cooperating companies. We ask new users of the NASLI lighting to fill in their notions in a questionary to find out what changes did the they notice after the NASLI sources have been installed.

The objective of this research is to find out how people subjectively perceive artificial light of high chromatic temperature and high colour rendering index. We want to find out which benefits of our products are the most appreciated by our customers and what features are important for them. The experience of our customers is a great feedback for us, it's a source of inspiration and suggestions for future improvements of our products.

Typical answerers are employees of middle or large companies that decided to try the NASLI lighting in some of their offices, on their production floors or similar venues. We lend our light sources to companies for the time of the research under certain conditions.

Structure of the data file:
N=76; women: 75 %, man 25 %; age 40.59 ± 9.04, min=19, max=67 years

How the research is made:
Answerers mark one of the five possible answers for each question according to their notion.
I fully agree; I somewhat agree; I do not know, I can not say; I rather disagree; I do not gree at all.

Presentation of results:
The answers are coded 1; ½; 0; -½; -1.
A summa of codes divided by N is calculated for each question (score), which is from interval <-1,+1>
The results are ordered by score descending.
The composition of answers is ordered ascending and show in colours:
I fully agree = green; I somewhat agree = light green; I do not know, I can not say = yellow; I rather disagree = pink; I do not gree at all = red.

Conclusions:
Questions with |score|>0.33 are considered statistically important. This conditions is fulfilled by the following questions:

  • I would feel regression to the traditional lighting as disturbing or even displeasing: answer YES
  • I feel much more comfortable at my working place: answer YES
  • Full spectrum lighting fulfils my notions of an ideal lighting: answer YES
  • I can work for a longer time without a feeling of eyestrain: answer YES
  • I concentrate better: answer YES
Question asked Composition of Answers Score
I would feel regression to the traditional lighting as disturbing or even displeasing +0,68
I feel much more comfortable at my working place +0,62
Full spectrum lighting fulfils my notions of an ideal lighting +0,59
I can work for a longer time without a feeling of eyestrain +0,50
I concentrate better +0,35
I have markedly better mood +0,31
I can see much sharper +0,29
I feel much less fatigue +0,28
I perceive colours better +0,24
I am irritated less often +0,14
My headaches and cervical vertebrae aches got better +0,03
I cope with the pre-menstruation period better +0,01
It seems to me that colleagues behave less aggressively -0,00
I felt like changing colours in my working space -0,09
I have a higher need for sex -0,13
My need for sleep has decreased -0,14
I stay at work longer than I did before -0,16