100pcs 5mm Blue Lights LED Diodes (Blue Lens) Diffused Round Lens 29mm Long Lead (DC 3V) +100pcs Resistors (for DC 6-12V) Included,Bulb Lamps Light Emitting Diode

They came quick and worked great in my project. I will buy for this seller again.

Functions well with resistor provided.

The 5mm red LEDs are much brighter and less diffused than the old LEDs I was trying to match in a retro-computing project. The brightness is of course fixable, even if the red is too warm, but the poor diffusion looks off.So I'll be using these as breadboard "beaters" rather than in finished projects. Even in this role, with the included 470 ohm resistors the LEDs are annoyingly bright.

But it's a pleasant yellow and will probably do the trick if you're not looking at it side by side with incandescent.

With the 470 ohm 1/4 watt resistors provided they are suitable for use with 3 volts or 2 AAA cells in series. For higher voltages you will want a higher resistance to avoid excessive current. I used 4.7K resistors with 3.6 volt batteries and they are bright enough to see in a well lit room. Their flash rate varies from unit to unit quite a bit, but for the price you really cant complain. the best current range for them in .25 to 5 milliamp. UPDATE Just checked and they are still running after being continuously on for well over a month. A set of 2 AAA batteries should last a few months of continuous use with a 4.7K series resistor. Perfect for a season of holiday decorations or some other seasonal kind of thing.

Great little LEDs for an outstanding price

First thing noticeable was the voltage drop across the Leds was noted on the bag, good thing in new designs. Bad thing, not noted that LEDs are high intensity. Green is much brighter than Red with current limiting resistors of equal value (220 ohm). To balance the Green light output to the Red, required a resistance approx 8 times larger than the Red Led. In doing so, the If (forward current) became essentially a 1:10 ratio Green to Red, In other words, the If of the Green Led is approx 1.1mA vs 10mA for the Red, with current limiting resistors of 1.8K ohms in series with the Green Led and 220 ohms in series with the Red Led. Supply voltage was a single source supply of 5 volts to each Led/resistor network. The low current draw for the Green led is a good thing, in that it requires less current from the driver, but the 3.0 to 3.2 voltage drop across the Green Led is awful close the the 3.3 Voltage rail of many low voltage (3.3 volt supply voltage) micro-processors. The voltage drop across the Red Led (2.0-2.2 Volts) is a little better, but leaves little headroom in 3.3V supplied circuits. I would have preferred a voltage drop across both diodes to be an equal, or near equal drop of 1.7V or less with equal If (forward current) draws. In any case the lower current draw of the Green Led with a higher lumen output may be a plus.

I bought these for replacements on a string of Christmas lights (all the blues seemed to go out at once). This was my 3rd purchase trying to find the correct length of the wires. Thankfully, these were longer than I needed, so we just clipped off the extra and they worked perfectly. They are bright and I have plenty of extras in case any of them go out again.

Pour ajouter à vos RC du réalisme beau bon pas cher sur que c'est plus long que d'acheter des kits tout faits mais tellement moins cher que ça vaut la peine tous mes rc sont équipées de lumières de ce genre et je suis très satisfait du rendement et de la durabilité je vous les conseils fortement le range de 3v a14v est idéal demande un peu d'équipements dextérité et patience mais un coup fini le résultat est très satisfaisant.

Exactly what I ordered. It is nice to have LED's come with their respective resistors. The LED's blue LED's are what I ordered and they are nice and bright using an 18650, 4000mAh 3.7V battery.

They like they are suppose to.