Features: Energy-Efficient: This aquarium lamp is designed to consume less energy, making it an eco-friendly choice for your fish tank lighting needs. Versatile Design: Suitable for both medium and small-sized tanks, this lamp can be easily clamped onto the side of your aquarium for convenient installation. Algae Control: The light spectrum of this lamp helps to inhibit the growth of algae, keeping your aquarium clean and clear. Scenic Lighting: Not only does this lamp provide essential light for your fish and plants, but it also enhances the overall appearance of your aquarium, creating a beautiful underwater landscape. Bright and Efficient: This light provides bright and efficient illumination, perfect for promoting the growth of aquatic plants. Specifications: Lamp length: 20cm, 30cm, 40cm, 50cm, 60cm(optional) 20cm Material: PP Voltage: DC5V Power: 3W Light color: blue and white Switching color: can not be switched Power cord length: 1.5 meters Suitable for fish tank: 20-30cm fish tank Product size: 20*7.5*5.5cm Product weight: 200g 30cm Material: PP Voltage: DC5V Power: 4W Light color: blue and white Switching color: can not be switched Power cord length: 1.5 meters Suitable for fish tanks: 30-40cm fish tanks Product size: 30*7.5*5.5cm Product weight:? 270g 40cm Material: PP Voltage: DC5V Power: 5W Light color: red, green, blue and white Switching color: color adjustment, brightness adjustment Switch: three modes: white, red, blue and green, red, blue and white green Suitable for fish tanks: 40-50cm fish tanks Power cord length: 2 meters Product size: 40*7.5*5.5cm Product weight:? 350g 50cm Material: PP Voltage: DC5V Power: 6W Light color: red, green, blue and white Switching color: color adjustment, brightness adjustment Switch: three modes: white, red blue green, red blue white green Suitable for fish tanks: 50-60cm fish tanks Power cord length: 2 meters Product size: 50*7.5*5.5cm Product weight:? 400g 60cm Material: PP Voltage: DC5V Power: 7W Light color: red, green, blue and white Switching color: color adjustment, brightness adjustment Switch: three modes: white, red blue green, red blue white green Suitable for fish tanks: 60-70cm fish tanks Power cord length: 2 meters Product size: 60*7.5*5.5cm Product weight:? 500g Package List: 1 * Lamp