ANSI White: Difference between revisions
add other companies that use ANSI White
(add picture of beamshots) |
(add other companies that use ANSI White) |
||
| Line 10: | Line 10: | ||
* 2700K | * 2700K | ||
This standard was adopted by [[Cree]] ( | This standard was adopted by [[Cree]] (as well as most others, to some degree) to describe the tint of their LED products. Cree numbered the quadrangles 1 through 8 starting with 6500K. They developed the concept further by dividing each ANSI quadrangle into four quadrants to get bins like 1A, 1B, 1C, and 1D being divisions of quadrangle 1 (6500K). Towards the cold end of the spectrum a non-ANSI quadrangle, quadrangle 0, was added. Tints lying outside of the ANSI standard, above and below quadrangles 0, 1, 2, 3, 4, and part of 5, are given names like 1R, 1S, 1T, and 1U. Cree subdivides regions 5, 6, 7, and 8 into even smaller subdivisions to get bins like 5A1, 5A2, 5A3, and 5A4. This gives a total of 16 different bins in one ANSI quadrangle. In the graphic below, the ANSI quadrangles are in red with the Cree bins overlaid on them (click for a larger version). | ||
[[Luminus]] does something similar by subdividing the standard ANSI quadrangles and adding their own outside of those limits. | [[Luminus]] does something similar by subdividing the standard ANSI quadrangles and adding their own outside of those limits. [[Nichia]], [[Samsung]], and [[Osram]] also use ANSI's scheme for at least some of their LED's. | ||
[[File:Ansiwhite.jpg|thumb|left|400px|Chromaticity chart with ANSI quadrangles by CCT and Cree divisions and subdivisions]] [[File:Ledtints.jpg|thumb|300px|Side-by-side comparison of a number of flashlights and tints. Click for full caption.]] <BR CLEAR="ALL"> | [[File:Ansiwhite.jpg|thumb|left|400px|Chromaticity chart with ANSI quadrangles by CCT and Cree divisions and subdivisions]] [[File:Ledtints.jpg|thumb|300px|Side-by-side comparison of a number of flashlights and tints. Click for full caption.]] <BR CLEAR="ALL"> | ||