Recent studies have demonstrated the importance of socialising in open spaces, to promote physical and psychological well-being for people of all ages, even after dark.
However, it is equally important to bear in mind that exposure to short wavelength (bluish) light has adverse effects on the human biological system, in particular on the circadian sleep cycle. In contrast, warm light, 3000K to 2200K, with a high colour rendering (CRI80), stimulates melatonin production, respecting the sleep/wake cycle, as well as ensuring high colour and visual perception.