The AquaticLife 34 inch, 460/620nm Purple 39 Watt T5 HO Fluorescent Lamps are 34 inches from end of pin to end of pin (for 36 inch fixtures/retrofits).
The 460/620nm Purple bulb spectrum is ideal for acroporas, anemones, clams, hard corals, leathers, mushrooms, polyps, soft corals and xenias.
The AquaticLife T5 bulbs will work in any T5 fixture, as long as you are using bulbs of the same wattage as those currently in your fixture. T5 bulbs come in two categories, HO bulbs (24W, 31W, 39W or 54W) and NOs (9W, 14W, 21W or 28W). T5s are 5/8" or .625" in diameter.
