The Coralife Aqualight Compact Fluorescent Aquarium Retrofit Lights are scalable and easy to install in an aquarium canopy. Please visit our Retrofit Lighting Chart to identify the best light for your particular reef aquarium.Dimensions: 46" X 5.5" X 1.25"Includes:Two 65 watt 10K and two 65 watt Actinic 03 compact fluorescent lamps Remote electronic ballastMoisture resistant end capsHighly polished reflectorTwo on/off switchesNo wiring necessaryInstallation hardware includedRecommended Accessories:To keep the light cycle consistent, we highly recommend using a timer. To achieve the dawn/dusk effect we recommend the Coralife Aqualight Power Center Timer.Installing at least one canopy fan in the canopy will be necessary to keep the light coolReplacement Parts:We carry all the replacement lamps and most replacement parts for the Coralife Aqualight Retrofits.