Great for Live Planted Aquariums, The 6,700K lamp provides plants with the light energy for photosynthetic reactions necessary to stimulate lush growth in freshwater aquariums, Replicates sunlight and generate a full-spectrum, high-intensity output in the appropriate wavelenths to promote photosynthesis, Compact fluorescent lamps emits powerful lumen output without consuming high energy or producing excessive heat, They provide photo-biological light requirements for aquatic life and enhance the appearance of the aquarium, The lamps come in two styles European straight pin base arrangement and japanese square pine base arrangement, Dimensions: 22""L x 1, 13""W x 2""H, SKU: RYLHC1407