Sorsi ta' dawl ta'-spettru sħiħ u perċezzjoni tal-kulur. Full-spectrum light sources will probably provide excellent color rendering. Indiċi tal-għoti tal-kulur (CRI) values for full-spectrum lighting sources are typically greater than 90. Color is a human perception constructed from the combination of the distribuzzjoni tal-qawwa spettrali (SPD) of the light source, the spectral reflectance of the materials being illuminated, and the tri-chromatic nature of the human visual system. If there are gaps or large variations in the SPD of a light source, there is a potential for confusion between the apparent colors of objects. Since full-spectrum light sources usually provide radiant power throughout the visible spectrum, subtle differences in the spectral reflectance characteristics of different objects are discernable. So, when color identification is part of the visual task, such as for graphic arts, museums and color printing applications, full-spectrum light sources will ensure good color discrimination.
Sorsi ta' dawl ta'-spettru sħiħ u prestazzjoni viżwali. Is-sorsi tad-dawl ta'-spettru sħiħ mhux se jipprovdu prestazzjoni viżwali aħjar minn sorsi tad-dawl oħra fil-biċċa l-kbira taċ-ċirkostanzi. Il-prestazzjoni viżwali hija l-veloċità u l-eżattezza tal-ipproċessar ta 'informazzjoni akromatika (eż., stampar iswed fuq karta bajda) mis-sistema viżwali tal-bniedem. Fil-livelli tad-dawl relattivament għoljin li tipikament jinstabu fl-iskejjel u l-uffiċċji, il-prestazzjoni viżwali hija essenzjalment mhux affettwata mid-distribuzzjoni tal-qawwa spettrali tas-sors tad-dawl, għalhekk is-sorsi tad-dawl tal-ispettru sħiħ-huma, lumen għal lumen, mhux aħjar minn kwalunkwe dawl ieħor sors.
Lighting produced by full-spectrum lamps may be, however, perceived as providing brighter architectural spaces than other lamps (Boyce, 2002; Berman, 1990). Three factors may contribute to this effect. First, full-spectrum light sources typically have a high temperatura tal-kulur korrelata (CCT) of 5000K - 7500K. Lamps with higher CCT values produce greater brightness perception than lamps with lower CCT of the same luminance. Second, most full-spectrum light sources have high color rendering properties, meaning that surface colors will appear more saturated. Greater saturation will also give the impression of greater brightness (Boyce, 1977). Third, the ultraviolet (UV) radiation produced by some full-spectrum fluorescent lamps has a fluorescing, brightening effect on textiles and paper that have been treated with whitening agents. These combined effects on brightness perception may indeed have positive impact on building occupants, but greater perceived brightness can also be a liability, depending upon the expectations of the space's occupants (Veitch and McColl, 2001).
Sorsi ta' dawl ta'-spettru sħiħ u saħħa. Is-sorsi tad-dawl ta'-spettru sħiħ mhux se jipprovdu saħħa aħjar mill-biċċa l-kbira tas-sorsi tad-dawl elettriku l-oħra. Riċerka reċenti wriet li l-attivitajiet ta 'kuljum tal-bniedem huma influwenzati ħafna miċ-ċiklu tad-dawl solari/dlam. L-aktar notevoli ta 'dawn iċ-ċikli ta' kuljum, jew ċirkadjani, huwa ċ-ċiklu ta 'rqad/qawmien; iżda attivitajiet oħra inkluż għarfien mentali, burdata, u forsi anke l-effettività tas-sistema immuni jgħaddu minn mudelli regolari ta 'kuljum. Id-dawl huwa l-aktar stimulu ambjentali importanti biex jirregola dawn iċ-ċikli ċirkadjani u jissinkronizzahom mal-ġurnata tax-xemx. Dawl ta 'wavelength qasir (blu) huwa partikolarment effettiv biex jirregola s-sistema ċirkadjana; dawl ta 'wavelength twil (aħmar) huwa apparentement inkonsegwenzjali għas-sistema ċirkadjana. Għalhekk, biex timmassimizza l-effiċjenza fl-effett tas-sistema ċirkadjana, sors tad-dawl m'għandux jimita spettru sħiħ, iżda minflok għandu jimmassimizza biss wavelengths qosra. Anke jekk sors ta' dawl ta'-spettru sħiħ jinkludi dawl ta' wavelength qasir fl-ispettru tiegħu, mhux bilfors jiżgura regolazzjoni ċirkadjana xierqa għaliex, barra minn hekk, l-intensità xierqa, iż-żmien, u t-tul tal-espożizzjoni għad-dawl huma kollha ugwalment importanti għal regolamentazzjoni ċirkadjana sodisfaċenti (Rea et. al, 2002).
Light therapy treatment of seasonal affective disorder (SAD) usually involves regulated exposure to a white light source, commonly 10,000 lux at the eye for 30 minutes per day (Partonen and Lönnqvist, 1998). Any white light source will be effective at these levels (Lam and Levitt, 1999), so full-spectrum light source is in no way special for treatment of SAD.
Full-spectrum light sources have no demonstrable benefit for dental health. These claims have no scientific merit (McColl and Veitch, 2001). The section, "Is ultraviolet radiation production important?" gives more detail.
