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T-5 & T-8 Aquarium Fluorescent Bulbs

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T-5 and T-8 Aquarium Fluorescent Bulbs

Need a little sunshine for your aquarium? There are a lot of options when looking for an aquarium bulb. If you already have an existing fixture, you will need to select a fluorescent bulb to match your existing setup. Fluorescent light bulbs come in varying sizes, T5 and T8 being two of the most popular. The "T" in T5 indicates the bulb is tubular shaped, while the "5" denotes that it is 5/8 of an inch in diameter, T8 is 1" in diameter. T5 lamps are 40% smaller than T8, but are capable of containing just as much and sometimes more light output in a smaller area.

FAQs About T-5 and T-8 Aquarium Fluorescent Bulbs

For a fish only system, you can select a bulb that is visually appealing to you. For an aquarium containing plants or corals, you would want to select a bulb that has the proper spectrum and lighting intensity for the aquatic life you are caring for.

One difference between these bulbs is their diameter. The "T" in T5 indicates the bulb is tubular shaped, while the "5" denotes that it is 5/8 of an inch in diameter, T8 is one inch in diameter.