Natural light: Sunlight is a very familiar source of light for fish and plants, and is a more natural way of lighting. For the aquarium swimming waterproof project, although the sun is a low-cost light source, the indoor sun is not very stable, and it is very difficult to control. Therefore, an artificial light source must be used instead. Sunlight is rarely used as the primary source of illumination for aquariums, but can be used as an auxiliary light.

Light efficiency: The resulting illuminance is too low compared to the input energy. As the bulb wattage increases. Its power is also rising. When using it, the effects of these thermal energy on the cylinder must be considered. Since the bulb will generate high temperatures, if it is caught in the water in the tank, it may cause the bulb to rupture. In fact, both the illumination and the optical frequency of the light will decay. Even if the person's eyes cannot be distinguished, it does not mean that other creatures cannot be distinguished or will not be affected.

Sterilization lamp: There is usually such a thing in marine aquaculture equipment, but as the name suggests, his main function is to purify the water and remove the bacteria that affect the health of the fish in the sea, instead of acting as lighting.

Hardness is one of the parameters that can reflect the production process and technology of pouring acrylic sheet, and is an important part of quality control. The hardness can reflect the purity of the raw material MMA, the weather resistance of the sheet, and the high temperature resistance. The hardness directly affects whether the sheet will shrink and bend, and whether the surface will be cracked during processing. Hardness is one of the hard and good indicators for judging the quality of acrylic sheets. The cast acrylic sheet has a current high hardness index with an average Dyro hardness value of 90 degrees.