would look as bright".
Or would it?
There are a million kinds of LED's out there these days, and even the same make and model wont always look the same. Many manufacturers make LED's and 'bin' them into two categories:
1. Brightness
2. Color
By brightness they usually mean the rating appropriate for that LED type (like mcd).
By color they mean the wavelength, in nanometers.
There is quite a variance in brightness, where a piece of a certain part number compared to another piece of the same part number could be four times as bright.
The variance in color is also quite variable, and the bin number for this would indicate where it falls within the color bandwidth specified for that part number.
A good example, or should i say a bad example, is recently i purchased several yellow LED's, three different part numbers, and one yellow seven segment LED. All of these LED's are not really yellow, they are orangish yellow (yellow but tinted orange).
I was really after the "lemon yellow" color of another LED i had purchased almost eight years ago. Compared to these other four part numbers, this one looks truly yellow not orange tinted.
Reading the data sheets for several yellow (and other colors too) LED's i find that the manufacturers *make* LED's that are classified as falling into their several 'bins' for brightness and color (color again referring to the wavelength within that color band such as yellow, not the difference between say red and green or red and yellow). I say *make* like that because although they do make them, they wont sell them that way. In other words, it seems impossible to purchase a lemon yellow LED because they will probably come in as orange tinted yellow, and the manufacturer doesnt care what wavelength the customer gets as long as it is "somewhat" yellow.
Any ideas how to get the right color, somehow, someday from these companies or their distributors?
Or would it?
There are a million kinds of LED's out there these days, and even the same make and model wont always look the same. Many manufacturers make LED's and 'bin' them into two categories:
1. Brightness
2. Color
By brightness they usually mean the rating appropriate for that LED type (like mcd).
By color they mean the wavelength, in nanometers.
There is quite a variance in brightness, where a piece of a certain part number compared to another piece of the same part number could be four times as bright.
The variance in color is also quite variable, and the bin number for this would indicate where it falls within the color bandwidth specified for that part number.
A good example, or should i say a bad example, is recently i purchased several yellow LED's, three different part numbers, and one yellow seven segment LED. All of these LED's are not really yellow, they are orangish yellow (yellow but tinted orange).
I was really after the "lemon yellow" color of another LED i had purchased almost eight years ago. Compared to these other four part numbers, this one looks truly yellow not orange tinted.
Reading the data sheets for several yellow (and other colors too) LED's i find that the manufacturers *make* LED's that are classified as falling into their several 'bins' for brightness and color (color again referring to the wavelength within that color band such as yellow, not the difference between say red and green or red and yellow). I say *make* like that because although they do make them, they wont sell them that way. In other words, it seems impossible to purchase a lemon yellow LED because they will probably come in as orange tinted yellow, and the manufacturer doesnt care what wavelength the customer gets as long as it is "somewhat" yellow.
Any ideas how to get the right color, somehow, someday from these companies or their distributors?