Aquatic Life 8-Watt Light Aquarium Light, 20-Inch, Fresh Water Broadcast Reflectors with a dimple design diffuse LED light evenly throughout the aquarium Expandable design allows up to four fixtures to be linked together with included hardware Adjustable width Frame Mounts hold fixture securely above the aquarium Durable on/off rocker switch for convenient lighting control cUL approved low-voltage power adapter provides metered electric to ensure long life of LEDs Broadcast Reflectors with a "dimple" design diffuse LED light evenly throughout the aquarium Expandable design allows up to four fixtures to be linked together with included hardware Adjustable width Frame Mounts hold fixture securely above the aquarium Durable on/off rocker switch for convenient lighting control CUL approved low-voltage power adapter provides metered electric to ensure long life of LED's