Artificial indoor lighting, particularly LED and incandescent types, often lacks infrared wavelengths and can be deficient in red and near-infrared light.

“there's no UVA or UVB indoors so we'll what we're actually under right now there there are visible wavelengths which are probably over representing blue right if we're indoors and then there's no infrared so there's nothing near infrared far infrared none of that indoors”

“it's really the imbalance it's really everything we're mentioning here is because there's an imbalance in these artificial environments because there's no infrared and why is there no infrared because glass and because indoor lighting is completely omitting that and just not putting it back in”

“but the idea with the sad lamps was to somehow um actually entrain your circadian rhythm with a bright light in the morning because there's no bright light outside in Seattle and your indoors I I think it could work from that perspective to where like it would give you like some stimulus in the morning but it's not it's not fixing the problem and the problem is we're indoor we're getting no Inc or infrared light that's the problem”

“and it's also the average person's never going to do this so for me um they're not really a great solution they're they're decent um but we can do better and I think low power incandescent where we're getting some infrared as well is is far better”