Its a standard size five gallon.
Is it:
- 17"X7X4
- 7"X7"X24
- 15"X7"X12
All of the above are 5 gallon tanks. The first one is a square box with 4 " of water in it. It would require multiple bulbs all with low light output. The second one is very tall with a small area. IT would require a very bright light . The last is roughly the size of a typical one. Its lighting requirements would be somewhere between the two other tanks.
Gallons, liters, wattage, incandescent, fluorescent, LED doesn't mater. Lumens, PAR, water depth, spectrum, CRI, and beam spread matter
So would taking a desk lamp and putting a good light bulb in it work or would a LED be better.And if so which one?
Gallons, liters, wattage, incandescent, fluorescent, LED doesn't mater. Lumens, PAR, water depth, spectrum, CRI, and beam spread matter. 99% of the time none of that is listed on the bulb packaging or manufactures web pages doesn't have any of that information. Even the price of the bulb is also not a good indication of how good the bulb is. There are probably a lot of expensive LED bulbs out there that are no better than a cheep Fluorescent tube. That is why "Will this bulb worK" is a very common question.
It is difficult to compare bulbs when you have none of the needed information. Fortunately you have some observations from people that have used a product similar to what you are looking at. Cowgirl did have a lot of algae but if I recall correctly she was using a fertilizer deficient in copper. I used the same fertilizer and like hear got a lot of algae. So I think her problem was caused by a fertilizer. Zante also had good experience with a deep large tank.
Two features that are very handy for any light is a timer to turn it on or off and a dimmer. That way you could adjust the on time and brightness as needed without going to the store again and buying another light.