Aquarium Light Sizes

Knowing aquarium light sizes is required if you are interested in buying a fish tank. When the time comes to replace it, you have to choose the same size. You also have to consider the replacement bulbs/tubes and fixtures.

Size Guide

A 20” fixture will fit on a 10 gallon tank. The 24″ is good for a 15 to 20 gallon High tank. For a 20L and 29, the 30” light fixtures are sufficient. The 36” is for 30, 40H, 50 and 65 gallon aquariums. The largest is the 48” fixture for 55, 60, 70 and 90 gallon tanks. The bulb sizes are 18”, 24”, 36” and 48”.

About Tube Diameters

Tubes of similar lengths do not necessarily have equal diameters. The majority of fish tank fixtures are compatible with T12, T10 and T8 tubes. However, it is better to be sure; check what dimensions are compatible with your fixtures. You can find the tube diameter by reading its printed codes. Your fish tank should have information about the codes, or you can check the Internet.

Lights for Small Fish Tanks

These are known as compact lights. Although small, they provide extra amounts of light. These should be used on tanks with saltwater corals or live plants. Aquarium light sizes are from 12 to 24 inches. But there are also longer sizes available. Because sizes vary a lot, it is advisable to do some research.

Light Duration

People leave aquarium lighting on for different durations. It will depend on what kind of lighting you are you using, the kinds of plants are in the aquarium and what fish you have. Tropical fish tanks require 12 lighting hours. Other aquariums only need six hours or less. Regardless of the aquarium light sizes, don’t use them for more than 12 hours. Leaving light on for longer periods could result in growth of algae. Intense light can increase water temperature too.

Other Information

Reef tanks need about ten hours of light. Coral reefs need high intensity lights. This is because corals require direct sunlight to flourish. If you have freshwater plants, 10 to 12 hours of light will be sufficient for them to stay healthy.

Whatever lights you use, remember that tanks need less light if there are only fish present. Of course you have to consider what kind of fish you have. If the species naturally lives in unlit or murky waters, use less light.-

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Dimensions of a Fresno Scraper

Dimensions of a Fresno Scraper

Since its invention in 1882, various Fresno scraper sizes have emerged. However, the one invented by James Porteous came with a front board measuring 8 feet wide by 2 feet high and fitted with metal cutting edge.

Porteous’ design also had a short end board. There was also a tailboard where the operator would stand. Dirt was hauled by folding the front board. The hauled dirt would be stored by the end boards.

History

Porteous invented the scraper because he saw how the Central San Joaquin Valley depended on irrigation. As Porteous worked on his design, he revised it numerous times.

He even exchanged ideas with Abijah McCall, Frank Dusy and William Deidrick. Those three inventors were designing their own scrapers, but Porteous bought the rights to all their designs. Thus Porteous got the sole patent for
the Fresno Scraper.

From 1884 to 1910, several Fresno scrapers were created at the Fresno Agricultural Works. The scraper would be used on road and railroad grading, construction, land leveling and agriculture. The scraper also played a role in the building of the Panama Canal. It would also be used during World War I. Eventually the design concept would spread and influence other earth moving equipment.

Design and Usage

While the Fresno scraper size would change, its basic design remained the same. The device laid the foundation for the contemporary earth moving scrapers. The Fresno scraper was notable for being able to move and scrape soil. It could also discharge the soil at a specified depth. It meant the volume that could be handled quadrupled.

The blade would gather the soil. It would run on a bowl that could be modified to change the bucket angle to the ground. This allowed the scraper to deposit dirt to low areas. The concept revolutionized the industry. Such was the impact that it influenced the design of modern earth movers.

Other Information

Porteous got Patent No. 261,759 for his invention, which was called the dirt scraper. It later became known as the Fresno scraper after Fresno, Los Angeles, the city where Porteous invented it. To this day the shop that Porteous created is still running.

Whatever the differences in Fresno scraper sizes are, one thing is certain: it is one of the most vital civil engineering and agricultural tools ever made. In 1991, the importance of the Fresno scraper was recognized when it was enshrined as an International Historic Engineering Landmark.