The VLO 2700K 12V LED Underwater Accent with Magnetic Adjustment System allows you to switch between three lumen outputs: 100, 200 or 400 easily with the use of the Magnetic Adjustment Key, which can be used to adjust the fixture underwater. Equipped with an adjustable cowl and mounting bracket, the VLO Underwater accent light is perfect for use in ponds, fountains, lakes, docks, streams, salt water and is safe for use with aquatic animals.