Ключевые слова: 40s, adult, brightness, business, businessman, caucasian, device, display, electronics, entrepreneur, face, fatigued, glowing, job, late, light, lit, low key, male, man, mobile phone, night, occupation, overtime, overworked, portrait, profession, professional, screen, screen fatigue, screenlight, serious, sleepless, smartphone, task, tech, technology, tired, tiredness, wakeful, work,