That is not hype. Blue light in general is not all that harmful and there is plenty of it outside in natural sunlight. The main problem with blue light is its ability to affect your circadian rhythm. This is the body’s natural rhythm of being awake in the daylight and sleeping well at night when blue light naturally diminishes. Using bright LEDs at night, especially over 5,000K, can lead to sleep disorders. At night it is recommended that you keep your light “mellow yellow” if you want to sleep well.