snowborder2645
Newly Enlightened
Hey I was wondering if someone could help me out. I'm trying to find out what the absolute brightest mcd rating for 5mm led bulbs are. All color's if possible. Thanks for the help.
I was referring to the x-color. the one that changes colors
Don't be confused. mcd is not a rating of total brightness, it's simply a measure of throw. Total brightness is measured in lumens. There is no conversion between them.
I belive you have have it upside down here. Luminous intensity is measured in candela. Lumen describes the amount of light in a defined direction and don't say anaything about the intensity of the source. Total output is measured in lumen. (The defined direction is then 4*PI*sr.) A large emmiting area with "lower" intensity, can easyly have a higher lumen number than a very smal high intensity source focusing it in one direction.
more at http://en.wikipedia.org/wiki/Candela
space
Sorry, no, you have it upside down. Lumens is total brightness, Lux is throw.
That is why Lux is commonly measured at 1m with a cheap Lux meter, where lumens must be measured in a very expensive integrating sphere.
Leaving science and definitions aside, we generally refer to Lumens as the total amount of light emitted from the LED as measured in an integrating sphere. Lux is a measurement of maximum light intensity at its' brightest point somewhere in the light pattern at a distance of one meter. Candela or candlepower or foot-candles is the same as Lux except the distance is one foot instead of one meter. 1000 mcd equals one Candela. Most conversion attempts at converting Lumens to Candela do not work in the real world. The primary angle and intensity of side spill when measured at only one point of reference with a Lux meter, can mean an error of up to 50% of total Lumen output.
Curt