Archive | Lamps

Determining the Candle Power of a Lamp? | Illumination Engineering

In this article we will discuss about the determination of candle power of a lamp. Use of Polar Curves to Determine the Candle Power of a Lamp: It is assumed that the luminous intensity or the candle power from a source is uniformly distributed over the surrounding surface. But none of the practical type of lamp provides light uniformly distributed [...]

By |2018-02-20T16:27:31+05:30February 20, 2018|Lamps|Comments Off on Determining the Candle Power of a Lamp? | Illumination Engineering

Lamp Types: Types of Arc Lamps | Illumination Engineering

In an arc lamp electric current is made to flow through two electrodes in contact with each other which are drawn apart. The result is an arc being struck. The arc maintains the current, and is very efficient source of light. There are various forms of arc lamps such as carbon-arc, flame-arc or magnetic-arc lamps. Type # 1. Carbon-Arc Lamp: [...]

By |2018-02-20T16:27:31+05:30February 20, 2018|Lamps|Comments Off on Lamp Types: Types of Arc Lamps | Illumination Engineering

Incandescent Lamps: Filament Materials and Types | Illumination

In this article we will discuss about:- 1. Filament Materials Used in Incandescent Lamps 2. Filament Dimensions of Incandescent Lamps 3. Types 4. Aging Effects 5. Effects of Voltage Variations. Filament Materials Used in Incandescent Lamps: For sometimes the arc lamps were used for general lighting purpose but as the carbon-arc lamps were complicated so these have been superseded by [...]

By |2018-02-20T16:27:31+05:30February 20, 2018|Lamps|Comments Off on Incandescent Lamps: Filament Materials and Types | Illumination

Fluorescent Lamp: Connections and Performance Curve | Illumination

The fluorescent lamp in common with most electrical devices may cause a certain amount of radio interference. This interference may be caused due to one of the following factors: 1. Direct radiation from the bulb to the antenna. This effect diminishes rapidly as the radio is separated from the lamp. Thus, for example, at a radius of 2.8 metres interference [...]

By |2018-02-20T16:27:31+05:30February 20, 2018|Lamps|Comments Off on Fluorescent Lamp: Connections and Performance Curve | Illumination

Gaseous Discharge Lamps: Principle and Drawbacks | Illumination

In this article we will discuss about:- 1. Principle of a Gaseous Discharge Lamp 2. Types of Gaseous Discharge Lamps 3. Drawbacks. Principle of a Gaseous Discharge Lamp: The basic principle of a gaseous discharge lamp is illustrated in Fig. 7.32. Gases are normally poor conductors, especially at atmospheric and higher pressures, but application of suitable voltage, called the ignition [...]

By |2018-02-20T16:27:31+05:30February 20, 2018|Lamps|Comments Off on Gaseous Discharge Lamps: Principle and Drawbacks | Illumination
Go to Top