(100 Pcs) MCIGICM 5mm LED Light Diodes, LED Circuit Assorted Kit for Science Project Experiment (Multi-Colored - 5 Color)

I have used these LEDs in many projects and all have worked well. They are bright, the positive lead is clearly longer, they mount securely when pushed into a properly sized hole and glued, and the color variety is helpful. I have used them in Bravo Box I designed that plays encouraging sounds, in a Christmas tree with electricity from a dynamo powered by a toy steam engine, and in greeting cards that light up when you press on the front of the card. The voltage required to light depends on the color. The white and blue can be directly lit without a resistor with CR2032 3 Volt batteries.

My very first few led Christmas light strings that are about 5 - 6 years old had a lot of dead or dimly lit blue leds. Decided to try to fix them with these and glad I did since they revived all of my strings and the blue is brighter than before. My strings varied from 250 to 300 leds that plug straight into 110v.

All 120 parts work fine just after delivery, not a over-time or burn-in test. It's not a defused case style, being designed to be used pretty much "straight on". A 4.6 Volt supply and 200 Ohm series resistor appropriate for testing, noticing the lower Vdrop colors were a bit brighter due to the higher current. The colors are nice - I especially like the pink. A good buy if you are looking for a variety of 5mm colored LEDs for projects.

will work great for my resin projects

I've been buying high brightness LEDs locally for years for half the price of this pack. I really didn't need all the colors, but this price is too good to say no to. Now I have all the LED's I'll need for many many projects!