These bright, flexible LED 'noodles' run off 3V and are great for adding cool cyberpunk light effects to wearables, models and dioramas or for making tiny pretend neon signs.
They're a narrow strip of tiny single coloured LEDs clad in a flexible silicon diffuser. They bend easily round corners*, can be stitched into wearables and just happen to fit neatly through tubes in popular ABS brick based construction systems. They're sometimes used to create the illusion of filament in steampunk 'Edison' lightbulbs, and they'd make for a wicked infinity mirror.
You wire them up just like standard LEDs by connecting them to a 3V power source. For a quick fix you could tape the ends directly to a 2032 coin cell or use crocodile leads to connect them to a 2 x AA or AAA battery pack.
If you're planning on using a heftier power supply then it's a good idea to include a suitable resistor in your circuit to protect the LEDs. We've tested them up to 200mA but current limiting them to 50-100mA or so is sensible if you want to extend their lifespan.
Alternatively, you could hook them up to a GPIO pin on a microcontroller and PWM them to adjust the brightness or flicker them on and off for awesome glitchy lighting effects. Make sure your microcontroller is happy with the possible current draw.
The end with the tiny hole in is the anode / positive end that needs connecting to power, and the end without the hole is the cathode / ground.