AB Bulbs are widely regarded as among the highest quality aquarium bulbs in the world. These premium HQI bulbs have been consistent favorites for their smooth color and extraordinary lifespan. In two years time, these bulbs lose less than 25% of their total output without a dramatic shift in color. AB HQI Bulbs are a perfect choice for pairing with the electronic Oceanballast E where an investment in the bulb will pay off for years to come. Try them with the magnetic Oceanballast M to pull great 16K and 18K colors from the overdriven 20K or enjoy the extraordinary growth of your SPS from the overdriven AB 10K.