Fluorescent tubes are categorized based on their diameter, which significantly affects their performance and application.

1. Straight-tube fluorescent lamps are available in various sizes such as T12, T10, T8, T6, T5, T4, and T3. The "T + number" notation represents the tube’s diameter in millimeters. Specifically, one "T" equals 1/8 of an inch, and one inch is 25.4 mm. So, for example, T12 = 25.4 × 1/8 × 12 = 38 mm. This classification helps users select the right size for their lighting needs.

2. The relationship between tube diameter and electrical characteristics is important. Thinner tubes generally offer higher light efficiency and better energy savings. However, they also require a higher starting voltage and more advanced ballast technology. In contrast, tubes with a diameter larger than or equal to T8 have lower ignition voltages that align well with standard 220V, 50Hz AC power supplies. These can typically be used with inductive ballasts.

On the other hand, tubes smaller than T8 have higher ignition voltages that don’t meet the standard requirement of being less than half the supply voltage. As a result, they must be paired with electronic ballasts, which generate the necessary high voltage to start the lamp and then regulate its operation efficiently.

When it comes to color, straight-tube fluorescent lamps are mainly divided into three types: tri-color (three primary colors), cool white daylight, and warm white daylight. Each type has different technical characteristics and visual effects.

1. Cool white and warm white fluorescent tubes usually use halogen phosphors and argon or helium-argon gas mixtures. Their color rendering index (R value) is typically below 40, far from the natural sunlight standard of R=100. These tubes produce a dull, greenish, or grayish light, making objects appear less vibrant. They also have lower luminous efficacy (around 30–40 lumens per watt) and shorter lifespans (5,000–6,000 hours). Due to these limitations, they are not considered efficient or environmentally friendly lighting solutions.

2. Tri-color rare earth phosphor tubes, filled with high-efficiency gases, provide a more natural light that closely resembles sunlight. Their color rendering index is over 80, making them ideal for environments where accurate color representation is important. These tubes are more efficient, with luminous efficacy reaching up to 65 lumens per watt. With modern electronic ballasts, their lifespan can extend beyond 15,000 hours. They are widely used in offices, schools, and homes due to their superior performance and energy-saving benefits.

Long Link Chain

The new Stainless Steel Wire Rope should not be used immediately under high speed and heavy load conditions, but should be run under low speed and medium load conditions for a period of time, so that the new wire rope can adapt to the use state first, and then the speed of the wire rope can be gradually increased to lift the load. That is, wire ropes must go through an initial break-in stage before high-speed, heavy-duty work.

When using stainless steel wire ropes and pulleys, care must be taken to prevent the wire ropes from jumping out of the pulley grooves. If the wire rope is still used after it is removed from the wheel groove, the wire rope will be deformed, kinked, broken wires, and broken strands. This will seriously shorten the service life of the wire rope. If the rope breaks, it usually has very serious consequences.