This Adafruit NeoPixel LED Strip with Alligator Clips has a total of 30 LEDs with a density of "30 LEDs per meter." It comes in a sleek black color and is 1 meter long. Although it's not very long, it packs a lot of shining action. It's perfect for use with microcontroller boards like Circuit Playground, Circuit Playground Express, micro:bit, or any other board you don't want to deal with wires and cables.
The strip comes with three alligator clips at one end: red, black, and white, which are color-coded for easy identification. These strips use SK6812 LEDs, so you don't need an inline resistor, and they operate from 3V logic to power.
NeoPixels are individually addressable LEDs, which means you get 30 RGB LEDs per meter, and you can control them separately or in groups. Each LED's red, green, and blue components can be adjusted with 8-bit PWM precision (that's 24-bit color per pixel). LEDs are controlled by daisy-chained shift registers along the strip, so you can cut the strip to shorten it if needed. Only one digital output pin is required to send data. PWM is embedded within each LED chip, so once you set the color, you can stop communicating with the strip, and all LEDs will continue with PWM.
The strip is made of flexible PCB material and comes in a weather-resistant casing. You can easily cut it with wire cutters.
To power these strips, you should use a 3-5V DC power source. Do not exceed 6V, or you may damage the entire strip.
These LEDs use approximately 4.8 Watts per meter (~1 Ampere @ 5V) at maximum brightness. The maximum rating assumes that all LEDs are at full white, and actual current for colored designs is typically less than one-third of the maximum current.