White LED light is produced by a narrowband blue LED chip (450-460nm) coated with a wideband yellow phosphor (green-red). It's additive, the spectrum is built

White LED light is produced by a narrowband blue LED chip (450-460nm) coated with a wideband yellow phosphor (green-red). It's additive, the spectrum is built up. Some of the blue light is converted by the phospor. You are most certainly exposed to the blue light. Those flies were exposed to too much and for too long. This study starts with the premise that blue light is harmful and fails to demonstrate anything.