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This is a ultra bright white 5mm LED, water clear. Sold in a pack of 10.

Extremely bright* (high luminous intensity) to my uncalibrated mark-one-eyeball. Looking directly into the beam is a bad idea!! A single LED shone clearly across my room on just 20mA. Basically, these are the types of LEDs you would find in an LED torch.

Note that taking photos of LEDs doesn't really show the true brightness because of the oblique angle (all LEDs are brightest in a fairly narrow range about the beam center).

Rough specs as provided from the manufacturer, 12000-14000 mCD (* See Below!), Forward Voltage 3-3.2v, 15-20mA

Remember to use a current limiting resistor, no resistor = instantly destroyed LED in most cases.

• A word about LED “brightness” or luminous intensity numbers, a lot of LEDs out there on the wholesale (and thus retail) market have wildly high MCD ratings, but for some LEDs (IR, UV particularly) an MCD number doesn’t even make the slightest bit of sense – sellers in the markets still put a high but usually believable MCD number on the label, they know you can’t test the claim.

In short, the number xxxx MCD may or may not be true. The best and really only way to see if a specific LED (or indeed batch of LEDs) is bright enough for YOUR purpose, is to buy a few and try it out. Luckily, LEDs are just a few cents!

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