Giesemann PowerChrome AquaFlora 48" 54W HO T5 Lamp Giesemann PowerChrome AquaFlora 48" 54W HO T5 Lamp. 45.75 inches from end of pin to end of pin (for 48 inch fixtures/retrofits) Full spectrum. Color spectrum developed for optimum plant growth and to bring out blue and red colors in your fish. Suitable for freshwater and planted aquariums The Giesemann T5 bulbs will work in any T5 fixture, as long as you are using bulbs of the same wattage and length as those currently in your fixture