Questions and answers

What is the phosphor in fluorescent lights?

What is the phosphor in fluorescent lights?

The inner lining of fluorescent tubes are coated with phosphors, which absorb the ultraviolet light from electrically charged mercury vapor and re-emit visible light based on a mixt of blue, green and red emitters. The blue phosphor in current use is already low in rare-earth elements.

What are Triphosphor tubes?

Triphosphor fluorescent lamps have 3 different phosphors coating the inside of the lamp. Such lamps produce about 10% more light output and can be made with better colour rendering ability and higher temperatures (colour appearance) than lamps with one phosphor.

What is Halo phosphor?

A wide variety of different whites can be created by the halophosphate system. The phosphor is in fact a blend of two different materials which radiate broadly in the blue and orange parts of the spectrum respectively. By changing the ratio of the two components a full range of warm to cool white hues can be achieved.

What is the main function of phosphor in the fluorescent?

The phosphor is responsible for nearly all the visible light produced by the lamp with the visible mercury lines contributing only a few percent to the total lamp light output. This article reviews fluorescent lamp phosphors that are used in general purpose illumination.

What is the difference between T5 and T8?

The major physical difference between T5 and T8 light bulbs is the length and diameter of the tube itself. The T5 tends to be slightly shorter than the T8 tube, and is significantly smaller in diameter. This factor is important to consider when looking at your fixture, because the two tubes are not interchangeable.

Why phosphorus is used in CRT?

The phosphor screen emites photons if accelerated electrons hit the material. The most common use of phosphor screens are cathode ray tube displays which are used in the early TV’s and oscilloscopes. The phosphor screen converts accelerated electrons into photons.

What is the difference between phosphor and phosphorus?

A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy. Phosphorus, the light-emitting chemical element for which phosphors are named, emits light due to chemiluminescence, not phosphorescence.