Talk:Bias lighting

Grandfather of Ambilight ?[edit]

Grandfather of Ambilight ?

"One of Sylvania's heavily advertised TV features was a lighted perimeter mask of adjustable brightness called "HALOLIGHT", which was purported to ease the optical transition if a viewer glanced from a dark background to the bright TV screen. Today Philips markets an Ambilight feature, lighting the wall behind a flat display to soften the viewing experience. HALOLIGHT could not be adapted for color TV, because color TV white balance (aka tracking from low to high brightness) was unpredictable. Since the white color temperature of the HALOLIGHT and the illuminated color screen could not be made equivalent, HALOLIGHT was withdrawn."

and:

"The company (as well as the Sylvania brand name) was acquired from GTE by Philips in 1981 ..."

source: https://en.wikipedia.org/wiki/GTE-Sylvania

Photos:

       https://movingimage.us/collection/artifact-halolighttv/
       https://www.radiomuseum.org/r/sylvania_halolight_23s22w.html [Sylvania HaloLight, Model 21C626 W ]
       https://www.youtube.com/watch?v=LaB1Iyq6Dk8 [1956 Sylvania Halolight 21C502 ]

regards

What is the problem with a low colour rendering index (CRI)?[edit]

With sufficiently bright light (Photopic vision), any light which has the same perceptual colour due to Metamerism (color) should work well to light the background and a high CRI does not have any noteworthy benefits I think. A non-noteworthy benefit may be the impact on wavelength defocus [1], which may still be actively in research. So why is high CRI recommended?

Hybrid Dog (talk) 15:42, 17 September 2023 (UTC)[reply]