Interesting topic. I shall be here again tomorrow

When it comes tto LED, its not the brightness that matter.

You need to check the lumen, wattage, power factor.

In some case, I would suggest you go thru the SDCM (for indoor) as the color temperature should not have huge variance.

A lot didn't aware of the impact of power factor especially by consumers. I agree with the marking as this will tell you how often you change the bulbs.

Most of my bulbs in my house are now failing. I've converted to LED.

http://www.lighting.philips.com.my/v2/help...here_to_buy.jsp

Sin Lian Wah

Remember to change ur driver/ballast too

Philips do give warranty. Just the terms and condition a lot strict.

If you in JB, look for Genuine Electric/Lighting. They are Philips distributor. Near Tmn molek I think.

Power factor with less than 1 indicates that the electricity supplier need to provide more generating capacity than actually required

Eg, a 100w with power factor of 0.6 means, you need to draw more than 100w to light up that bulb.

Ideal PF would be 0.9

Problem with electronic is that the pcb board will spoiled due to leakage from capacitor.

Depending on what you comparing now?
LED ? then few parameters for measurement I would say

1. Lumen/W which translate to efficacy
2. dollar/lumen which means how much you paying for the brightness (in some case, u need this comparison)
3. Power factor - should be 0.9 as it is electronic item. Exception for candle type LED
4. rated lifetime - consumer range usually rated at 15k~25k hrs which would give you the performance over at least 3 yrs of usage
5. CRI - i personally think this is important which gives you a better quality of light


there are few more parameters but it should be sufficient for now.

CRI = color rendering index.

Google it.
Should be buying those at least 80 and above.

Depending on how you look at it. If im paying 4~5 times over thr standard CFLi, of course need to have a better specs.

Depending on the brightness you need. Elderly needs more lights where as im used to have minimal light at home. Just so it is rather cozy.

Go for E27 screw type of bulb if you have no confident in certain brand. You can change the bulb anytime rather confined to a certain fixture.

Zhaga compliant fixtures has yet to be taken momentum and will take a while before all the component can be interchangeable

GE is pulling out from Asia.

That would be the glass tube.
Power factor 0.7
Cri 70
And lower lifespan. I think 20k hrs