These are pretty awesome. I got them for Christmas projects and ugly sweaters. They are very bright, 3mm diameter, clear lens (non-diffused), have a small flange and came in a nice anti-static bag.Tested few of them with 5V supply and current limiting resistors ranging from 120ohm to 330ohm. LEDs worked as expected. *Always use a current limiting resistor to avoid headaches*.The flashing/blinking sequence is pre-programmed and can't be changed. The IC does not have a precision clock so when…

I used these to replace incandescent "grain of wheat" pilot lights in a piece of equipment that I have. They incandescent lamps only had a lifetime of about 6 months. These should last the life of the equipment. With a 12v supply, I used a 1k resistor in series with the LED and it was the perfect brightness for my use. I have another 93 LEDS left for other projects :-)

Received my order quickly. No surprises, received what I expected- what was described. Have had no issues everything functions as it should. Will use this vendor again without hesitation.

If my pee were the same color as the LED they call yellow-green I wouldn't worry. That LED is really just yellow. However, if your pee really is yellow-green you might wat to get that checked. I'm not a doctor but, in my experience that isn't normal.

Purchased these for a number of different projects that I needed some UV/Black Light for. I haven't made it through the bag yet, but haven't hit a "dud" yet. They all work as expected, and actually put out quite a bit of light from a single CR2032 without any other kind of circuitry or work. For what they cost, 100 UV LEDs is a no brainer, even if you don't need 100 of them right now, put them in your kit! They also sell other colors as well.

Used these to replace some white LED lights on a pre-lit Christmas tree. The cost of these made the effort to replace totally worth it, as they are incredibly vibrant. Love the color changing, too - they start all on the same color and gradually get out of sync perfectly to keep the tree colorful. Highly recommend.

I like this selection of leds, it is quite a wide variety of colors. I've bought several times from Chanzon because of their selection and quality.

I used these for a science inquiry in my classroom. The students had to design a flashlight. Their surprise was a lot of fun when they realized they had different colors.

I used these color changing LEDs for a small 3D printed birthday cake that lights up. I also replaced tealight LEDs with these color changing LEDs.

Nicely packaged and labelled.Was for a science experiment with the grandchildren.they loved itand LED's very bright so made a big hit in their tent.

These are tough and last a long time. They are also very bright. Perfect size for what I need and I like having an assortment. Have used them on a few diy projects and replacing the headlights in a R/C car.

Lights! Lots of them! What's not to like? Each color was sorted into a separate baggy with a label, which is good because they all have clear lenses so you otherwise can't tell the color without powering them up. Also, they list the voltage ranges for each, which is nice for calculating what resistors to use. All of the ones I've tested have been consistent and bright.

I have wired up 35 of them and pumped over 20 mA of current through each and they have worked consistently well since the start. I did not expect this level of intensity from this small of an LED – don't look directly at them!

These worked perfectly for my application of them The whole reason I need to get them in the first place is the original ones that came with a different kit I was using were all dead and these ones replaced them and fit perfectly with one minor detail I had change however that can't be held against this person's product just the other companies kit but all in all I would definitely order these again every one of them I checked works like it should and they arrived earlier than expected so I'm…

These are a clear plastic so they are nice and bright.Good flashing speed and good looking colors.Will buy again when needed.

Bought the multi pack. Yellow and green-yellow look more orange than yellow. Uv purple is very dim but it was expected from their luminosity scale, only minor uv effect. All other colors match what you would expect and are vibrant.

Used to make brush bot for my son’s school project. The lights on these were very bright and worked perfectly Thanks for attention.

OF the large batch, I've only used 13 for a testing board (board to verify all MCU pins are soldered). All worked with no issues.

The packages for seven colors indicated they were for 3 to 3.2 volts, as described. However, three colors were for 2 to 2.2 volts.

Great Leds when they work. Out of the 10 of each color, 4 of the 10 seemed weaker or a lower quality glow. I had to test each one to find the ones that did work properly or had the right amount of glow. Great price but be aware 40% of them will be of a substandard quality.