The Sun-GLO T8, 20 W linear fluorescent aquarium bulb generates a natural-looking daylight spectrum with a refreshing natural white light for a balanced and natural look to any aquarium. Sun-GLO is an excellent aquarium bulb for emitting a warm white light that is most suited to freshwater community setups. This normal output bulb has a colour temperature of 4200K and fits all suitable standard and electronic ballasts. Size: 61 cm (24 in).