Category: LED Knowledge

the Problem of Heating

Like traditional light sources, semiconductor light-emitting diodes (LEDs) also generate heat during operation, the amount of which depends on the overall luminous efficiency. Under the action of external electric energy, the radiation of electrons and holes recombine to produce electroluminescence. The light radiated near the PN junction also needs to pass through the semiconductor medium and packaging medium of the chip itself to reach the outside (air).… Read More

Definition of color temperature:

When the color of the light emitted by the light source is the same as the color of the black body at a certain temperature, the temperature of the black body is called the color temperature of the light source.

Introduction to color temperature

Because most of the light emitted by the lighting source is white light, the color table temperature or correlated color temperature of the light source is used to refer to the relative whiteness of the light color, in order to quantify the light color performance of the light source.… Read More

Abstract

The modern ship and port industry is divided into regional lighting systems such as ship repair and building construction, factory buildings and cargo yards, and ship body configuration. Due to the inherent characteristics of the industry, there are unique requirements for lighting.

Working Areas of Seaport

The work area of ​​this industry is generally divided into the following three types:

(1) Ship repair and building construction

Modern ship repair and building ushered in the era of large and giant ships.… Read More

Analysis on maintenance coefficient of LED road lighting

Abstract: in the lighting design, an important work is to determine the lighting maintenance coefficient, which should consider the installation, use and maintenance costs and other factors. In recent years, with the maturity of LED technology, LED lighting products have been widely used in the field of road lighting. However, due to the difference between LED and traditional light source, there are some differences in the determination of maintenance coefficient in the application of LED lighting products.… Read More

Environmental Analysis of LED Lamps and Fluorescent Lamps

Lamp introduction

Fluorescent lamps

Fluorescent lamps are generally called fluorescent lamps. Traditional fluorescent lamps, i.e. low-pressure mercury lamps, use low-pressure mercury vapor to release ultraviolet rays after power-on, so that the phosphor emits visible light. This is the principle of fluorescent lamps. Therefore, it is a low-pressure arc discharge light source.

working principle

When the switch is turned on, the power supply voltage is immediately applied to the two poles of the starter through the ballast and the lamp filament.… Read More

Lux Level Required for Cricket Stadium

  Cricket ground requirements

• Size of the Ground
  The size of the training ground is a nearly circular field with a radius of no less than 55 meters. The training area is about half of the standard field. However, the pitching and hitting areas must be set up in the training ground, and their orientation, size, materials, equipment and facilities are the same as those of the competition field.

Does Dimming LED Light Save Energy?

The current dimmers basically use “triacs” to control the light intensity of the bulb. It should be said that using a dimmer to adjust the same bulb, the darker the light, the smaller the current, and the relatively more power-saving.

Using a dimmer to control the brightness of the bulb does have an “efficiency” problem, but it is an unquestionable fact that controlling the brightness of the bulb can save power.… Read More