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How to Use a Solderless Breadboard
Written By: John R. Sewell

Over the years there has been confusion regarding describing the output intensity of LEDs. It is now time to consider how LEDs are and were advertised. In the beginning of commercial LEDs, the output was in single and low double digit Millicandela’s (mCd, mcd). Red was the only color and light output was in the 3-10+mcd. Soon new formulations provided us with higher output Red units and the first Greens. The red LEDs now had outputs into the double digits and were called “Brights”. Ok great but then came even higher outputs and more colors.

Since LED innovation is continuous, along came even brighter LEDs. Well we have had: LED, High Brightness LED, Super Bright LED. So what did we call the next generation?? We were stuck with terms as “Extra”, “Super Extra” etc. LEDs until someone picked “Ultra Bright” and it stuck. Ultra Bright covered a very large span, from a couple thousand mCd to Lumens. Lumens is the standard rating for illumination LEDs as this is what incandescent bulbs were rated. Technology now has available many really bright LEDs, usually in White but colors are catching up. Now we have LED into the thousands of Lumens and just call them “High Lumen” LEDs and list a Watt and Lumen value. Be careful of the “Wattage” listing!! You can have several LEDs rated the same wattage but have very different Lumen output. Remember Lumens for light and Watts for power. Always consider your application and check for these values and disregard superlative “Ad Man” Buzz words and terms.

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How does an IEC Power Cord Work
How to Determine LED Brightness
Using a Digital Multimeter
How to Use a Laser Tachometer
How to Use a IR Digital Temperature Device
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How to Read Resistors
How to Use High Brightness LEDs
Understanding Basic Scientific Notation
Meter Safety Category Listing
How to Use a Panel Meter
How to Use an AC Clamp Meter
Understanding Regulated and Unregulated Power Supplies
Understanding High Brightness LED Buzz Words

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