Voltages of light bulbs

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You enquired about the various voltages of light bulbs in Singapore.

There are different types of bulbs for different lights or lamps. Some examples include halogen bulbs, incandescent, Light-emitting diodes (LED) and xenon bulbs. Hence, there are many variants of bulbs available depending on the device it is for.

As to your question on the voltage of light bulbs, you may find this explanation useful:
"One watt is the power produced by a current of 1 ampere under a pressure of 1 volt. When you buy an electric light bulb, you may notice that it is marked with a voltage number and the number of watts- indicated as W100 or W60 or W25 as the case may be. A 100-watt bulb will give you more light than a 60-watt bulb. It will also use up more electrical power."
(Taken from e-database go.grolier.com, last accessed on 01 August 2007.)

Perhaps you would like to clarify what device or electrical equipment you are referring to before we can narrow down the light bulb voltage/wattage.

Meanwhile, you may wish to refer to the following resources for detailed explanation on light bulbs:

Online
1) "How Light Bulbs Work", from home.howstuffworks.com/light-bulb.htm

2) "Incandescent light bulb", from Wikipedia - en.wikipedia.org/wiki/Incandescent_light_bulb
[please note that wikipedia can be edited by members of the public and so information found there may not be entirely accurate.]
(both sites last accessed on 02 August 2007)

Books
1) Title The science of a light bulb / Neville Evans.
Author Evans, Neville.
Publisher Hove : Wayland, 1999.
Call no.: J 621.32 EVA

2) Title The lightbulb / Joseph Wallace ; foldout illustration by Toby Welles.
Author Wallace, Joseph E.
Publisher New York : Atheneum Books for Young Readers, 1999.
Call no.: J 621.32 WAL

3) Title Electricity and the lightbulb / James Lincoln Collier.
Author Collier, James Lincoln
Publisher New York : Marshall Cavendish Benchmark, c2006.
Call no.: JR 621.32 COL For Reference Only (only available at Bishan, Jurong and Woodlands libraries)

To check the availability of the above titles, please use our online catalogue at http://www.nlb.gov.sg/

I hope the above satisfies your enquiry. If you need further information, please do not hesitate to email us.