Artificial Light vs Sunlight: A Substitute, Never an Equal

Summary

Artificial light is a **substitute for sunlight, never an equal** — sunlight is full-spectrum (UV, visible, and roughly half near-infrared) and orders of magnitude brighter, while LED and fluorescent light is blue-spiked, UV-poor, near-infrared-poor, dimmer, and often flickering — so the honest move is to get real daylight when you can and mimic its **day-bright / night-dim** pattern with artificial light when you can't, while keeping the genuinely-superior claims (spectrum, intensity, UV-mediated physiology) firewalled from the wellness overclaims (that "junk light" damages your retina or cau