Tunze 8831 Eco Chic refugium LEDSpectrum especially suitable for refuge and basin for algae growth in seawater and freshwater. If you want to further enhance the rate of growth, consider a proven growth accelerator like ChaetoGro, you can purchase here The total consumption is approx. 9 W. Can be used in the air and under water. Power supply 100 240V 50 60Hz Including Magnet Holder for a glass thickness up to 10 mm (3 8"). Dimensions without the bracket (L x W x H): 305 x 25 x 13 mm