Energy Saving Lighting in The Home

Efficient lighting in the home

This article is written to show the information which is already not published. Links are given for the works already done on the subject:

For basics introduction to lighting devices click on following links.

Basic introduction about different efficient lighting devices.

Basics & Tips of CFL

Home lighting tips


General tips:

Like any other machinery, as the size of machine increases, efficiency also increase and vice versa. Same is true for lighting devices. Smaller lighting devices are less efficient and larger lighting devices are more efficient. For example a Compact Flourscent Lamp (CFL) of 8 watts give 50 lumens of light per watt of electricity consumed, while the similar 23 Watt CFL will give 70 lumens per watt.

Not only the efficiency is the factor but overall consumption lighting requirement need to see, for example in small baths, corridors, or lawns, table lamps, or narrow spaces we don’t need to use 23 watt CFL but we shall only use 8 watt CFL. Similarly, if in a big room we have to install 2 or more CFL of 23 watts, it will be better to use there a 40 Watt fluorescent tube light with ballast.


Please note that there are also poor quality CFLs in the market. They have very little life of about 2000 hours and claiming for 8000 hours on the labels. So whenever using a poor quality CFL all of saving calculations will become void. So always look for famous, historical branded CFLs from trusted store.

For energy efficiency promoting organizations, or manufacturers: to realize all of the calculations, and plans we also have to supply these efficient products to the end user. From manufacturer to the end user in between there are intermediates. “The strength of the chain lies in its weakest link”, if there is any loose link in the chain from manufacturer to the end consumer, including sales employees, importers, distributors, or even retailers, dreams of energy efficiency or sales target will never come true. In our 20 years of experience we have seen many loop holes, weak links the the chain from manufacturer to the end consumer.

Types of efficient lighting.

The lighting industry is abuzz with new technologies to meet energy savings requirements. Compact fluorescent lights, CFLs, light emitting diodes, LEDs, and organic light emitting diodes, OLEDs, are becoming familiar terms.


Beyond CFLs

Cold cathode fluorescent lights (CCFLs) hidden behind LCD displays are being replaced. Light emitting diodes (LEDs), once limited to red, amber, and green have bloomed in white light. Advances are occurring almost daily in developing white LEDs that are more naturally colored and brighter. The highest grades are called high-brights (HB-LEDs). HB-LEDs are moving in to take the lead as back-lighting agents leading to thinner, lighter, and brighter displays.

Organic light emitting diodes (OLEDs) are formed from organic rather than inorganic materials and are printed rather than etched or layered on a semiconductor chip. Printing is an economical process but requires great control. So far OLEDs are still waiting for their big technological break-though but it’s only a matter of time.

Quickly on the heels of the diodes are other more exotic technologies including quantum dots and semi-micro-electro-mechanical systems (micro machines!).

All of these competing technologies have advantages and disadvantages. As of now the markets are wide open and can accommodate many participants. Because the entry cost to some of these technologies is fairly low even small operators have chances to make big profits. However, once a 15% reduction in energy is achieved advanced lighting controls, smart grids etc. will offer less savings.

download comparison matrix. pdf format


Light-Emitting Diodes    Compact Fluorescent Lamps     Cold Cathode Fluorescent Lamp



Lighting types

Flourscent lamps

Luminous efficacy