08-28-2010, 09:04 PM
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Originally Posted by Freddy
90 gallons. I found out how to get into the light fixture. The bulbs are square pins, 65 watts each. So for a fluorescent bulb, do I need a 65 watt one, or a 130 watt one? Can I use a lower wattage, and that's okay? I know that using a higher wattage is dangerous. I'm having a hard time finding a double tube, square pin, 48" fluorescent strip bulb.
I do not plan on growing plants in the tank, but if I can find a light that will let plants grow, then I will get that over one that does not let plants grow. This shouldn't be a very bright tank.
First, the tube. I don't know the difference between pins. I know that regular T8 or T12 fluorescent tubes have one style of pin and the newer T5 tubes are different, so I suspect that is what you mean; replacement tubes will have to be whichever fits.
The length of the tube is all you need, plus the pin style. Take an existing tube with you to the store. Tubes come in standard wattages for the length, 48-inch T8 and T12 are 40w (except some manufacturers make lower wattage tubes like 32 or 36 but they have the intensity of the other 40w) and T5 are probably different. Get a full spectrum (sometimes called daylight) tube, Phillips, Sylvania and GE make them, with a kelvin rating around 6500K as others mentioned.
As for the screw in bulbs, use Compact Fluorescent 10w daylight (around 6500K) bulbs.