This flexible LED filament is often seen in 'Edison-like' LED bulbs, arranged in different patterns to give a bright warm lighting effect. It's made of dozens of micro LED diodes that are bonded together on a flexible printed circuit backing, then coated in silicone for protection. Since the LEDs are in parallel, you only need ~3V to light 'em up - we recommend current limiting with a resistor to let max 50mA through.