An Original PL18 Tube offering half sunlight and half marine blue light. Ideal for marine use or if you fancy an under the sea look for your tropical set up. Its far easier to view your stock in this blue and white light than with an all blue tube. 4 pin fitting.   The Aqua One Sunlight and Marine Blue combination PL18 is ideal if you plan to keep marines or just fancy a deep sea look to your set up. A better all round choice than an all blue tube as the light is brighter and easier to appreciate. Not ideal if you plan to grow plants in a tropical set up though and will not fit your Aqua Nano set up.