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Stock up on your go-to-drawer LEDs here with this 50 pack, included is

10 Red Water Clear LEDs 10 Green Water Clear LEDs 10 Yellow Water Clear LEDs 10 Blue Water Clear LEDs 10 White Water Clear LEDs

50 LEDs total for just $6

I don’t have a maximum recommended current, but I would shoot for about 20 mA maximum (most LEDs are happy around that).

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 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, especially if you see very very high MCD figures. 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!

A customer asks "what resistor do I need for a 12v supply". Here is a rough ballpark formula for you for 1 or more led's in series which will get you around 20mA through them (give or take!)

Vf1 = (R+G+Y)*2.1 Vf2 = (B+W)*3.1 Vr = 12 - Vf1 - Vf2 Resistance = Vr / 0.02

where R G Y B and W are the number of each LED you are putting in series.

Note that if Vr is negative, you have too many led's in series :)

Example 2 Red, 1 Green and 1 Blue in series:

Vf1 = (2+1+0) * 2.1 = 6.3 Vf2 = (1+0) * 3.1 = 3.1 Vr = 12 - Vf1 - Vf2 = 12 - 6.3 - 3.1 = 2.6 Resistance = 2.6 / 0.02 = 130

[ 50-led-selection-5mm ]