The Life-Glo II bulb has become our bulb of choice in our own aquariums. We have tested over a dozen leading aquarium bulbs and have not found any that compare to the incredible intensity and crisp appearance that the Life-Glo II bulb produces. After switching to these bulbs we found that our fish developed better colours with 48 hours due to the natural spectrum produced by the Life-Glo II bulbs! The spectrum is very close to natural sunlight and with the high intensity produced by these bulbs your live plants will also flourish.<