Arayan
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- Oct 26, 2009
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I have a multimeter, then I can tryThanks for taking the measurement, but for all we know, that might not be completely true either. You can measure the current draw through the tailcap, by replacing the tailcap with the multimeter. Or do you just have a volt meter?
I know that UV is measured in mW but I found that also IR is measured in mW and not in lumen as I thought.No, lumens is a measure of visible brightness. Example: A warm LED at 200 lumens would be just as bright as a cool LED at 200 lumens, but the warm lights are usually sold with a lower lumens rating. So even if they have the same amount of light, the warm LED gets a lower lumens rating because it doesn't appear to be as bright. And I know UV is measured in mW, not sure about IR.
This is from Light and Infrared Irradiation in CCTV systems
...The wavelength of the visible spectrum ranges from 400nm (violet) to 700nm (red) is divided into a rainbow of colors from red to orange to yellow to green to blue and violet. CIE (International Commission on Illumination) also known as the International Commission on Illumination, clearly stated the position of light, known as photometry, applies only to the visible spectrum Optical and includes units such as nit, lumen, lux and candela. The measurements of the human eye detection ability showed that efficiency is highest in the color green (100% to about 555 nm) and decreases to 50% near Orange (around 610 nm) and blue (around 510 nm) and less than 10% by red (650 nm) and violet (around 470 nm). Humans do not feel the waves radiated in the ultraviolet (below 400 nm) or infrared (above 700 nm) regions. IEC standards are quite complex but it suffices to understand the value of a source of green light (555nm) with 1W of light output is equal to 683 lumens, which for a point to measurement point is equal to 683 Candela. In contrast, 1W red (650 nm) light output equivalent to only 68 candela and 68 lumens 1W and infrared (above 700 nm) energy flow is equal to 0 Lumen, 0 and 0 lux candela...
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