We verified it works, we are not experts in aquarium lights. The unit turns on and produces lights. Interacting with the buttons produces a change in the lights. The model is HG957.

The extenders are home position is 18 inches. The plastic goes to 16.5inch and the actual light is about 12 inches. Width is 4 inches

Enhance the beauty of your aquarium with the Hygger Auto On Off 18-24 Inch LED Aquarium Light. This unit is specifically designed to provide full spectrum lighting for all water types, making it ideal for general lighting applications.

Featuring an extendable and dimmable 26W LED bulb, this fish tank light boasts 7 colors to create a stunning underwater world. The hygger brand, made in China, guarantees the highest quality product. Upgrade your aquarium lighting today with the Hygger Auto On Off 18-24 Inch LED Aquarium Light.