Spectrum especially suitable for refuge and basin for algae growth in seawater and freshwater. 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 (12" x 1" x .7"), cable length 1.5 m (59"). This lamp contains built-in LED bulbs. The bulbs in the lamp can not be replaced.