Pentair 619963 Transformer 12 -14V 300W - This transformer is for use with Pentair MagicStream® Laminars, IntelliBrite® Landscape LED Lights, GloBrite Pool and Spa LED Lights. A transformer is used to transfer energy from one circuit to another. It can raise or lower the electrical current. Made for easy installation and use, this transformer will help ensure the best service life possible.