AND let's not forget, each of these hand-held computers (we call smartphones) w/illuminated flat-panel hi-res displays is LED-based illumination too.
I often in the mornings in the pre-dawn hour wear lightly tinted sunglasses on my morning bicycle ride ... they have a yellowish tending towards red tint, but the visual impression in use is…
AND let's not forget, each of these hand-held computers (we call smartphones) w/illuminated flat-panel hi-res displays is LED-based illumination too.
I often in the mornings in the pre-dawn hour wear lightly tinted sunglasses on my morning bicycle ride ... they have a yellowish tending towards red tint, but the visual impression in use is like, kinda, night and day. Instead of grayish concrete in artificial or early morning sunlight, the concrete streets and parking lot (where I ride laps) takes on a 'warmer', more pleasant appearance. BTW cataract surgery in 2018 for me at age 63.
AND let's not forget, each of these hand-held computers (we call smartphones) w/illuminated flat-panel hi-res displays is LED-based illumination too.
I often in the mornings in the pre-dawn hour wear lightly tinted sunglasses on my morning bicycle ride ... they have a yellowish tending towards red tint, but the visual impression in use is like, kinda, night and day. Instead of grayish concrete in artificial or early morning sunlight, the concrete streets and parking lot (where I ride laps) takes on a 'warmer', more pleasant appearance. BTW cataract surgery in 2018 for me at age 63.