People Tend to look the best when illuminated by light bulbs that measure around 2700 kelvins, most bulbs, whether incandescent, Led, Compact fluorescent or halogen, are labeled “soft white/ warm white” (2,700- 3000 kelvins), “bright white/cool white” (3,500–4,100 kelvins) or daylight” (5000–6500 kelvins).