

For a 36 inched tank, about 25 to 30 1 LED just as mentioned.For tanks that are 36 to 48 inches long and 12 to 24 inches tall, I would suggest a fixture that is about 6 to 8 inches wide (or even a little wider) – For a 48 inch long fixture you should have around 30 to 40 1 watt LEDs, either Cree or Apollo manufactured LED diodes.

I have included some simple guidelines for both fresh water and marine environments so you may also have a few other points of comparison. Most people do not pay attention to the angle of the lenses used or do not understand how different the wattage can be with a LED diode (as compared to a T5 or T8 bulb) and they end up with a fixture that really will not meet their long term needs. This is not and all inclusive set of instructions, just something simple to get you started if you have no experience with LED lighting. I have learned that applying a few simple concepts, or rules of thumb, LED lighting become a whole lot easier to understand.

However, it doesn’t have to be all that difficult if you keep it simple. When looking at getting LED lighting for your aquarium, it can seam overwhelming when considering all the features and options that you will have to choose from.
