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. Our energy saving T8 sizes can save you up to $30.00 per year in electricity over the thicker T12 size lamps! Effective up to 10 000 hours.