Efficiency in Lighting

Using electronic ballast in place of conventional ballast will save energy.

For a 40 Watts Tube light the power consumption is approximately 44 watts at rated voltage with conventional choke, where as for the same tube light with same voltage and same candle power the consumption will be approximately 36 watts. around 15 % energy saving. Now with development of CFL which has an energy saving of 70 % compared with incandescent lamp and 50% saving compared to fluorescent lamps, the use of electronic ballast for energy saving has become insignificant

For replacement of energy saving MV lamps see the link below

http://www.powersavingsolution.com/hid-lamps.htm

Yes, there is a detailed explanation but would require a lot of typing. Let me know if interested.

If you don mind , I really like to know

I may be shot down in mid flight but here goes...A conventional incandescent lamp converts about 95% of the power it consumes into heat the other 5% is light. One the other scale a CFLi lamp has about 90% light with only 10% going as heat generated. I am basing the afore mentioned on a 100 watt incandescent and a 23w CFLi (compact fluorescent lamp integrated). Apart from the almost equal lumen intencity it is quite clear to c the wattage difference between the two. This lower power relates to approx 800Kwh saving in the 10000 hour lifespan of the lamp (which is 12 times longer than a Incandescent). It relates to 200kg burning coal or 160l fuel oil. The lamp is 75% recyclable and the manufacturing process has being improved to further lower power requirements during manufacture as this is part and parcel of the overall power savings. The cadmium and arsenic have being largely removed there is still however mercury involved in the manufacturing process.

How it works? well it converts the ac voltage into DC smooths it using a capacitor, a self resonating oscillator creates a high frequency which powers the lamp (nutshell version)

Hope this helps...i'm off for a cup of tea

Thanks a lot for explanation. it's very clear

I wish I can discuss another topic again with you, of course with a cup of hot coffe /tea.

Also, it is important to note that the heat load will be reduced thus affecting the a/c load on the building. And as technology keeps progressing, there are some great advancements to LED lights that very well could replace the CF lights.

H.P.Sodium offers more light per watt than Mercury Vapor,

sometimes with minimal changes in the installation.