What is a Cold Cathode Light?

The full name of cold cathode lamp is cold cathode fluorescent lamp, which is a low pressure glow gas discharge lamp.

Cold cathode lamp

Right!

Cold cathode lamp

The ordinary fluorescent lamp that we use every day is a low-pressure arc heat cathode discharge lamp. The electrodes at her ends are hot, also called hot cathode lamps. The temperature of the electrodes at both ends of the cold cathode lamp is relatively low, commonly known as cold cathode lamps.

The English full name is Cold Cathode Fluorescent Lamp, referred to as CCFL, which means cold cathode fluorescent lamp.

Due to the use of glow discharge,

Take the most commonly used indoor lighting, 20 mm in diameter and 2.5 m in length, and a 40 mA inductive transformer with a three-primary cold cathode tube as an example, 48 lumens / watt.

Luminous efficiency is slightly lower than fluorescent lamps. But much higher than incandescent.

Power consumption indicator, 15 W / m. This is an example of the main product of indoor lighting, that is, a 40 mA inductive transformer with a 2400K color temperature, a 20 mm diameter, and a 2 m 5 length lamp.

Compared with ordinary fluorescent lamps, what are the advantages and disadvantages of cold cathode lamps?

Hot-cathode fluorescent lamps use arc heating to achieve arc discharge. The advantage is that the light efficiency is high, but the life is relatively short, generally only 6000-8000 hours.

Hot cathode fluorescent lamps have relatively high luminous efficiency. The high-end tri-color phosphor powder tube can achieve 70 lumens / watt. Using ordinary fluorescent lamps will save some electricity compared to cold cathode lamps. However, the advantages of cold cathode lamps are obvious in the following situations,

As auxiliary lighting such as dark tank lights, it does not need to be too high in brightness. The transformer for the cold cathode lamp will save power than a fixed 36-watt fluorescent lamp.

Instead of incandescent lamps, cold cathode lamps are very power efficient.

Cold cathode lamps, as high-end lighting, generally have a color rendering index above 85 and can reach a maximum of 99. For ordinary fluorescent lamps, most of them only have a color rendering index of more than 60. The fluorescent powder of the lamp is also a cheap halogen powder. The three primary color lamps must be ordered specially.

The cold cathode lamp can be bent into the required shape according to the situation on the spot to achieve tailoring.