This high intensity lamp with peak emissions in the blue and red regions serves to maximize the photo biological processes in plants, The emission spectrum closely resembles the absorption curve of chlorophyll-A, promoting maximum photosynthesis, ideal for planted aquariums, or terrariums, Also great for shy fish species such as dwarf cichlids, discus, etc, Use in conjunction with Ultra Sun or Tropic Sun, Zoo Med"s line of fluorescent aquarium lamps are made in Europe for ultra high quality, color, and longer burn life, Dimensions: 22", SKU: RYLHC6653