Lighting Advice

[florabliss 0]

Hi,

May I have some advice as to what to take note of when buying lightings (esp those downlights)?

Thanks!

[MaCe 3]

Hi,

May I have some advice as to what to take note of when buying lightings (esp those downlights)?

Thanks!

don buy downlights that comes with ballasts. get those that you can just screw in a energy saving bulb.

[gnomish 0]

don buy downlights that comes with ballasts. get those that you can just screw in a energy saving bulb.

by the way what's the use of ballast? most downlights selling at balestier comes with it..

[hihihi 0]

purpose of ballast:

http://en.wikipedia.org/wiki/Electrical_ballast

Personally I also prefer the screw-in type (technical name: E27 lampholder) instead the plug-in type. At least no need to use force to pull the bulb out which may in the process wip out the holder as well.

points to note:

- bulb colour (yellow, mid yellow, or white)

- brightness

- lampholder type

- ballast or no ballast

[yoongf 11]

All florescent lamps have ballast, which is required to step up the voltage to 2000V to trigger the electrons + dunno what to emit light.

http://en.wikipedia.org/wiki/Compact_fluorescent_lamp

PLCs are those with seperate ballast, while the newer ones CFL with integrated ballaast.

I understand that PLCs.. long ago.. the logic was that the tubes will fail first, seldom the ballast, so... shd simply replace the tube rather than with the ballast. But these days.. got cheap electronic ballast, so.. replace both together also no heart pain.

Lamsp that can accept a screw on CFL need to be bigger since need space to screw in.