What's the difference between lumen and mcd?
- Anonymous1 decade agoFavorite Answer
They explain a bit there : http://led.linear1.org/how-do-i-convert-between-ca...
And there :
"My old high school physics book has about a one page, really vague discussion of the candela and the lumen, and something called a solid angle, which is measured in steradians, and how a complete sphere is 4pi steradians, and a candela is the intensity of a source that gives off a lumen per steradian, that is, 4pi lumens. If you don't already know better, you can at least see the signs that something is missing in that brief description:
If the candela and lumen were really related only by a constant like 4pi, they'd just be different-sized units for measuring exactly the same thing. Why bother?
Using that formula blindly, you'd think a 2300 mcd LED gives off 29 lumens. That's about a thirtieth of the 60W light bulb, or in the same ballpark as my 2-1/2 watt bike headlight, out of less than a tenth of a watt of electricity. That would be an impressive LED, all right, but alas, those things that sound too good to be true.... "(1)
Here is a convertor : http://led.linear1.org/lumen.wiz
Another one : http://www.lpelectric.ro/en/support/lumeni_en.htmlSource(s): (1) http://www.dcwi.com/~nybarra/LED.html
- Anonymous4 years ago
Lumens To McdSource(s): https://shorte.im/a9EfO