These strips of flexible PCB are each populated with a blue surface mount LED and a 330 Ohm current limiting resistor. Flexible LED strips are the perfect way to add light to your project while retaining the greatest amount of flexibility. They are great for crafts, e-textiles, or any application where flexibility is a concern. Project description, more information and ordering can be found at https://www.sparkfun.com/products/10639 Datasheet: http://www.sparkfun.com/datasheets/DevTools/LilyPad/S150ANB4-H.pdf