4
5
6
Science Daily. URL: www.sciencedaily.com/releases/2016/07/160714134753.htm.
7
Halper M. Here comes the graphene LED bulb // Lux Review (2015). URL: www.luxreview.com/article/2015/03/here-comes-the-graphene-led-bulb.
8
Sample I. Matter will be created from light within a year, claim scientists // Guardian (2014). URL: www.theguardian.com/science/2014/may/18/matter-light-photons-electrons-positrons.
9
Bunnin N., Yu J. The Blackwell Dictionary of Western Philosophy. John Wiley & Sons, 2008.
10
NHS, 2017. Vitamin D. URL: www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d.
11
Heschong Mahone Group, Inc., 2012. Daylighting and productivity. URL: http://h-m-g.com/projects/daylighting/projects-PIER.htm.
12
Solatube n.d. Daylighting facts and figures. URL: www.solatube.com/sites/default/files/field/files/tech_resources/daylight-facts-figures-retail-sales.pdf.
13